The Senate is the
upper house
An upper house is one of two Legislative chamber, chambers of a bicameralism, bicameral legislature, the other chamber being the lower house. The house formally designated as the upper house is usually smaller and often has more restricted p ...
of the
bicameral
Bicameralism is a type of legislature that is divided into two separate Deliberative assembly, assemblies, chambers, or houses, known as a bicameral legislature. Bicameralism is distinguished from unicameralism, in which all members deliberate ...
Parliament of Australia
The Parliament of Australia (officially the Parliament of the Commonwealth and also known as the Federal Parliament) is the federal legislature of Australia. It consists of three elements: the Monarchy of Australia, monarch of Australia (repr ...
, the
lower house
A lower house is the lower chamber of a bicameral legislature, where the other chamber is the upper house. Although styled as "below" the upper house, in many legislatures worldwide, the lower house has come to wield more power or otherwise e ...
being the
House of Representatives
House of Representatives is the name of legislative bodies in many countries and sub-national entities. In many countries, the House of Representatives is the lower house of a bicameral legislature, with the corresponding upper house often ...
.
The powers, role and composition of the Senate are set out in Chapter I of the
federal constitution as well as federal legislation and
constitutional convention. There are a total of 76 senators: twelve are elected from each of the six
Australian states
The states and territories are the national subdivisions and second level of government of Australia. The states are partially sovereign, administrative divisions that are self-governing polities, having ceded some sovereign rights to the feder ...
, regardless of population, and two each representing the
Australian Capital Territory
The Australian Capital Territory (ACT), known as the Federal Capital Territory until 1938, is an internal States and territories of Australia, territory of Australia. Canberra, the capital city of Australia, is situated within the territory, an ...
(including the
Jervis Bay Territory
The Jervis Bay Territory (; "JBT") is an internal states and territories of Australia, territory of Australia. It was established in 1915 by the transfer of jurisdiction from the state of New South Wales to the federal Commonwealth of Australia ...
and
Norfolk Island
Norfolk Island ( , ; ) is an States and territories of Australia, external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head, New South Wales, Evans Head and a ...
) and the
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...
(including the
Australian Indian Ocean Territories). Senators are popularly elected under the
single transferable vote
The single transferable vote (STV) or proportional-ranked choice voting (P-RCV) is a multi-winner electoral system in which each voter casts a single vote in the form of a ranked ballot. Voters have the option to rank candidates, and their vot ...
system of
proportional representation
Proportional representation (PR) refers to any electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to political divisions (Political party, political parties) amon ...
in state-wide and territory-wide districts.
Section 24 of the Constitution provides that the House of Representatives shall have, as near as practicable, twice as many members as the Senate. The constitution grants the Senate nearly equivalent powers to the House, with the exception that the Senate may not originate or amend
money bill
In the Westminster system (and, colloquially, in the United States), a money bill or supply bill is a bill that solely concerns taxation or government spending (also known as appropriation of money), as opposed to changes in public law.
Con ...
s, but only reject or defer them. According to convention, the Senate plays no role in the formation of the
executive government and the
prime minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
is drawn from the majority party or coalition in the House. However, the government appoints a
Senate leader and senators hold senior roles in the government as
ministers of state
Minister of state is a designation for a government minister, with varying meanings in different jurisdictions. In a number of European countries, the title is given as an honorific conferring a higher rank, often bestowed upon senior ministers ...
and members of
cabinet. Senators from
the opposition likewise serve in the
shadow ministry.
The Senate elects one of its members to serve as
president
President most commonly refers to:
*President (corporate title)
* President (education), a leader of a college or university
*President (government title)
President may also refer to:
Arts and entertainment Film and television
*'' Præsident ...
, who exercises only an ordinary vote and has no
casting vote
A casting vote is a vote that someone may exercise to resolve a tied vote in a deliberative body. A casting vote is typically by the presiding officer of a council, legislative body, committee, etc., and may only be exercised to break a deadlock ...
. Since the late 20th century, it has been rare for governments to hold a majority in the Senate and the
balance of power has typically rested with
minor parties
A minor party is a political party that plays a smaller (in some cases much smaller, even insignificant in comparison) role than a major party in a country's politics and elections. The difference between minor and major parties can be so great ...
and
independents. In practice, this means government bills cannot be assured of passage and regulations may be disallowed. The power to bring down the government and force elections by blocking
supply
Supply or supplies may refer to:
*The amount of a resource that is available
**Supply (economics), the amount of a product which is available to customers
**Materiel, the goods and equipment for a military unit to fulfill its mission
*Supply, as ...
also exists, as happened for the first and only time during the
1975 constitutional crisis. Since major reforms in 1970, the Senate's role as a house of review has increased with the expansion of its
committee system.
Senators from states ordinarily serve six-year terms, with half of the Senate up for re-election at each
federal election along with the entirety of the House of Representatives. However, there is no constitutional requirement that Senate and House elections occur at the same time; the last Senate-only and House-only elections occurred
in 1970 and
1972 respectively. The terms of senators from territories expire at the dissolution of the House of Representatives, typically at three-year intervals.
Section 57 of the constitution provides for a
double dissolution
A double dissolution is a procedure permitted under the Australian Constitution to resolve deadlocks in the bicameral Parliament of Australia between the House of Representatives (lower house) and the Senate (upper house). A double dissolutio ...
as a mechanism to break deadlocks between the House and Senate, whereby the entire Senate is dissolved and all seats made vacant.
Casual vacancies are filled by the relevant state or territory parliament, or by the corresponding state or territory government on an interim basis if the parliament is not in session.
A constitutional amendment passed in 1977 provides that casual vacancies must be filled by a member of the same political party as the previous senator.
Origins and role

The
Constitution of Australia
The Constitution of Australia (also known as the Commonwealth Constitution) is the fundamental law that governs the political structure of Australia. It is a written constitution, which establishes the country as a Federation of Australia, ...
established the Senate as the second chamber of the national parliament of the newly
federated Australia. In contrast to countries employing a pure
Westminster system
The Westminster system, or Westminster model, is a type of parliamentary system, parliamentary government that incorporates a series of Parliamentary procedure, procedures for operating a legislature, first developed in England. Key aspects of ...
the Senate plays an active role in legislation and is not merely a chamber of review. Instead of being modelled solely after the
House of Lords
The House of Lords is the upper house of the Parliament of the United Kingdom. Like the lower house, the House of Commons of the United Kingdom, House of Commons, it meets in the Palace of Westminster in London, England. One of the oldest ext ...
, as the
Senate of Canada
The Senate of Canada () is the upper house of the Parliament of Canada. Together with the Monarchy of Canada#Parliament (King-in-Parliament), Crown and the House of Commons of Canada, House of Commons, they compose the Bicameralism, bicameral le ...
was, the Australian Senate was in part modelled after the
United States Senate
The United States Senate is a chamber of the Bicameralism, bicameral United States Congress; it is the upper house, with the United States House of Representatives, U.S. House of Representatives being the lower house. Together, the Senate and ...
, by giving equal representation to each state and almost equal powers with the lower house.
This was done to give less populous states a real influence in the Parliament, while also maintaining the traditional review functions upper houses have in the Westminster system. This has led to the description of a "
Washminster system" to describe the Australian political structure.
Although the
prime minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
and
treasurer
A treasurer is a person responsible for the financial operations of a government, business, or other organization.
Government
The treasury of a country is the department responsible for the country's economy, finance and revenue. The treasure ...
, by convention (though not legal requirement), are members of the House of Representatives (after
John Gorton
Sir John Grey Gorton (9 September 1911 – 19 May 2002) was an Australian politician, farmer and airman who served as the 19th Prime Minister of Australia, prime minister of Australia from 1968 to 1971. He held office as the leader of the leade ...
was appointed prime minister in 1968, he resigned from the Senate and was elected to the House), other ministers may come from either house,
and the two Houses have almost equal legislative power.
As with most upper chambers in
bicameral parliaments, the Senate cannot introduce or amend
appropriation bill
An appropriation bill, also known as supply bill or spending bill, is a proposed law that authorizes the expenditure of government funds. It is a bill that sets money aside for specific spending. In some democracies, approval of the legislature ...
s (bills that authorise government expenditure of public revenue) or bills that impose taxation, that role being reserved for the lower house; it can only approve, reject or defer them (as famously occurred in the lead up to
the Dismissal). That degree of equality between the Senate and House of Representatives reflects the desire of the Constitution's authors to prevent the more populous states totally dominating the legislative process.
In practice, however, most legislation (except for
private member's bill
A private member's bill is a bill (proposed law) introduced into a legislature by a legislator who is not acting on behalf of the executive branch. The designation "private member's bill" is used in most Westminster system jurisdictions, in wh ...
s) in the Australian Parliament is initiated by the government, which has control over the lower house. It is then passed to the Senate, which has the opportunity to amend the bill, pass or reject it. In the majority of cases, voting takes place along
party lines, although there are occasional
conscience vote
A conscience vote or free vote is a type of vote in a legislative body where legislators are allowed to vote according to their own personal conscience rather than according to an official line set down by their political party. In a parliamenta ...
s.
The Senate maintains
a number of committees, which engage in a wide variety of inquiries. The results have no direct legislative power, but are valuable forums that raise many points of view that would otherwise not receive government or public notice.
Electoral system
The system for electing senators has changed several times since
Federation
A federation (also called a federal state) is an entity characterized by a political union, union of partially federated state, self-governing provinces, states, or other regions under a #Federal governments, federal government (federalism) ...
. The original arrangement involved a
first-past-the-post
First-past-the-post (FPTP)—also called choose-one, first-preference plurality (FPP), or simply plurality—is a single-winner voting rule. Voters mark one candidate as their favorite, or First-preference votes, first-preference, and the cand ...
and
block voting
Block or bloc voting refers to a class of electoral systems where multiple candidates are elected simultaneously. They do not guarantee minority representation and allow a group of voters (a voting bloc) to ensure that only their preferred candi ...
system, on a state-by-state basis. This was replaced in 1919 by
preferential block voting
Multiple transferable voting, sometimes called block preferential or block instant-runoff voting, is a winner-take-all system for electing several representatives from a multimember constituency. Unlike single transferable voting (STV), preferenti ...
. Block voting tended to produce
landslide
Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides ...
majorities. For instance, from 1920 to 1923 the
Nationalist Party held all but one of the 36 seats, and from 1947 to 1950, the
Australian Labor Party
The Australian Labor Party (ALP), also known as the Labor Party or simply Labor, is the major Centre-left politics, centre-left List of political parties in Australia, political party in Australia and one of two Major party, major parties in Po ...
held all but three.
In 1948,
single transferable vote
The single transferable vote (STV) or proportional-ranked choice voting (P-RCV) is a multi-winner electoral system in which each voter casts a single vote in the form of a ranked ballot. Voters have the option to rank candidates, and their vot ...
with
proportional representation
Proportional representation (PR) refers to any electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to political divisions (Political party, political parties) amon ...
on a state-by-state basis became the method for electing senators. At this time the number of senators was expanded from 36 to 60 and it was argued that a move to proportional representation was needed to even up the balance between both major parties in the chamber. The change in voting systems has been described as an "institutional revolution" that has had the effect of limiting the government's ability to control the chamber, as well as helping the rise of Australian minor parties.
The
1984 election saw the introduction of
group ticket voting, in order to reduce a high rate of informal voting that arose from the requirement that each candidate be given a preference, and to allow small parties and independent candidates a reasonable chance of winning a seat. This allowed voters to select a single party to distribute their preferences on their behalf (voting "above the line"), but voters were still able to vote directly for individual candidates and distribute their own preferences if they wished (voting "below the line") by numbering every box.
Following 1981,
the government has only had a majority in the Senate from 2005 to 2007; otherwise, negotiations with other parties and independents have generally been necessary to pass legislation.
Group tickets were abolished in advance of the
2016 election to reduce the number of senators elected with a very small number of first preference votes as a result of the candidates of these micro-parties preferencing each other.
In the place of group tickets, a form of
optional preferential voting
One of the ways in which ranked voting systems vary is whether an individual vote must express a minimum number of preferences to avoid being considered invalid ("spoiled" or "informal" or "rejected").
Possibilities are:
* Full preferential vot ...
was introduced. As a result of the changes, voters may now assign their preferences for parties above the line (numbering as many boxes as they wish), or individual candidates below the line, and are not required to fill all of the boxes. Both above and below the line voting now use optional preferential voting. For above the line, voters are instructed to number at least their first six preferences; however, a "savings provision" is in place to ensure that ballots will still be counted if less than six are given. For below the line, voters are required to number at least their first 12 preferences. Voters are free to continue numbering as many preferences as they like beyond the minimum number specified. Another savings provision allows ballot papers with at least 6 below the line preferences to be formal. The voting changes make it more difficult for new small parties and independent candidates to be elected to the Senate, but also allow a voter to voluntarily exhaust preferences — that is, to ensure their vote cannot flow to specific candidates or parties — if none of the voter's candidate preferences are elected.
The changes were subject to a challenge in front of
High Court of Australia
The High Court of Australia is the apex court of the Australian legal system. It exercises original and appellate jurisdiction on matters specified in the Constitution of Australia and supplementary legislation.
The High Court was establi ...
by sitting South Australian Senator
Bob Day of the
Family First Party
The Family First Party was a conservative political party in Australia which existed from 2002 to 2017. It was founded in South Australia where it enjoyed its greatest electoral support. Since the demise of the Australian Conservatives into w ...
. The senator argued that the changes meant the senators would not be "directly chosen by the people" as required by the constitution. The High Court rejected Day's challenge unanimously, deciding that both above the line and below the line voting were consistent with the constitution.
[''Day v Australian Electoral Officer for the State of South Australia'' ]
Ballot paper
The Australian Senate voting paper under the single transferable vote proportional representation system resembles the following example (shown in two parts), which shows the candidates for
Victorian senate representation in the
2016 federal election.

To vote correctly, electors must either:
* Vote for at least six parties above the thick black line, by writing the numbers 1–6 in party boxes. Votes with fewer than six boxes numbered are still admitted to the count through savings provisions.
* Vote for at least twelve candidates below the thick black line, by writing the numbers 1–12 in the individual candidates' boxes. Votes with between six and twelve boxes numbered are still admitted to the count through savings provisions.
Because each state elects six senators at each half-Senate election, the quota for election is only one-seventh or 14.3% (one third or 33.3% for territories, where only two senators are elected). Once a candidate has been elected with votes reaching the quota amount, any votes they receive in addition to this may be distributed to other candidates as preferences, if there are still open seats to fill.
With an odd number of seats in a half-Senate election (3 or 5), 50.1% of the vote wins a majority (2/3) or (3/5).
With an even number of seats in a half-Senate election (6), 57.1% of the vote is needed to win a majority of seats (4/6).
The ungrouped candidates in the far right column do not have a box above the line. Therefore, they can only get a primary (number 1) vote from electors who vote below the line. For this reason, some independents register as a group, either with other independents or by themselves, such as group B in the above example.
Names of parties can be shown only if the parties are registered, which requires, among other things, a minimum of 1,500 members.
Order of parties
The order of parties on the ballot papers and the order of ungrouped candidates are determined by a random ballot conducted by the
Australian Electoral Commission
The Australian Electoral Commission (AEC) is the independent statutory agency of the Australian Government responsible for the management and oversight of Australian federal elections, plebiscites, referendums and some trade union
A ...
.
Deposit
Candidates, parties and groups pay a deposit of $2,000 per candidate, which is forfeited if they fail to achieve 4% of the primary vote.
Public subsidy
Candidates, parties and groups earn a public subsidy if they gain at least 4% of the primary vote. At the 2019 federal election, funding was $2.756 per formal first preference vote.
Membership
Under sections 7 and 8 of the Australian Constitution:
* The Senate must comprise an equal number of senators from each original state,
* each original state shall have at least six senators, and
* the Senate must be elected in a way that is not discriminatory among the states.
These conditions have periodically been the source of debate, and within these conditions, the composition and rules of the Senate have varied significantly since federation.
Size and nexus
Under
Section 24 of the Constitution, the number of members of the House of Representatives has to be "as nearly as practicable" double the number of senators.
The reasons for the nexus are twofold: a desire to maintain a constant influence for the smaller states, and maintain a constant balance of the two Houses in the event of a joint sitting after a double dissolution. A
referendum in 1967 to eliminate the nexus was rejected.
The size of the Senate has changed over the years. The Constitution originally provided for six senators for each state, resulting in a total of 36 senators.
The Constitution permits the Parliament to increase the number of senators, provided that equal numbers of senators from each original state are maintained; accordingly, in 1948, Senate representation was increased from 6 to 10 senators for each state, increasing the total to 60.
In 1975, the two territories, the
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...
and the
Australian Capital Territory
The Australian Capital Territory (ACT), known as the Federal Capital Territory until 1938, is an internal States and territories of Australia, territory of Australia. Canberra, the capital city of Australia, is situated within the territory, an ...
, were given an entitlement to elect two senators each for the first time, bringing the number to 64. The senators from the Northern Territory also represent constituents from Australia's Indian Ocean Territories (
Christmas Island
Christmas Island, officially the Territory of Christmas Island, is an States and territories of Australia#External territories, Australian external territory in the Indian Ocean comprising the island of the same name. It is about south o ...
and the
Cocos (Keeling) Islands
The Cocos (Keeling) Islands (), officially the Territory of Cocos (Keeling) Islands (; ), are an Australian external territory in the Indian Ocean, comprising a small archipelago approximately midway between Australia and Sri Lanka and rel ...
), while the senators from the Australian Capital Territory also represent voters from the
Jervis Bay Territory
The Jervis Bay Territory (; "JBT") is an internal states and territories of Australia, territory of Australia. It was established in 1915 by the transfer of jurisdiction from the state of New South Wales to the federal Commonwealth of Australia ...
and since 1 July 2016,
Norfolk Island
Norfolk Island ( , ; ) is an States and territories of Australia, external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head, New South Wales, Evans Head and a ...
.
The latest expansion in Senate numbers took place in 1984, when the number of senators from each state was increased from 10 to 12, resulting in a total of 76 senators.
[Department of the Senate, ''Senate Brief'' No. 1]
'Electing Australia's Senators'
. Retrieved August 2007.
Term
Senators normally serve fixed six-year terms (from 1 July to 30 June). At most federal elections, the seats of 40 of the 76 senators (half of the 72 senators from the six states and all four of the senators from the territories) are contested, along with the entire House of Representatives; such an election is sometimes known as a half-Senate election. The seats of senators representing states elected at a half-Senate election are not contested at the next election, provided it is a half-Senate election. However, under some circumstances, the entire Senate (and the House of Representatives) is dissolved, in what is known as a
double dissolution
A double dissolution is a procedure permitted under the Australian Constitution to resolve deadlocks in the bicameral Parliament of Australia between the House of Representatives (lower house) and the Senate (upper house). A double dissolutio ...
. Following a double dissolution, half the senators representing states serve terms ending on the third 30 June following the election (two to three years) and the rest serve a five to six-year term.
Section 13 of the Constitution requires the Senate to allocate long and short terms amongst its members. The term of senators representing a territory expires at the same time as there is an election for the House of Representatives.
Section 13 of the Constitution requires that in half-Senate elections, the election of State senators shall take place within one year before the places become vacant. The actual election date is determined by the Governor of each State, who acts on the advice of the State Premier. The Governors almost always act on the recommendation of the Governor-General, with the last independent Senate election writ being issued by the Governor of Queensland during the
Gair Affair in 1974.
Slightly more than half of the Senate is contested at each general election (half of the 72 state senators, and all four of the territory senators), along with the entire House of Representatives. Except in the case of a double dissolution, senators for the states are elected for fixed terms of six years, commencing on 1 July following the election, and ceasing on 30 June six years later.
The term of the four senators from the territories is not fixed, but is defined by the dates of the general elections for the House of Representatives, the period between which can vary greatly, to a maximum of three years and three months. Territory senators commence their terms on the day that they are elected. Their terms expire the day prior to the following general election day.
While there is no constitutional requirement for the election of senators to take place at the same time as those for members of the House of Representatives, the government usually synchronises the dates of elections for the Senate and House of Representatives. However, because their terms do not coincide, the incoming Parliament may for some time comprise the new House of Representatives and the old Senate, except for the senators representing the territories, until the new senators start their term on the next 1 July.
Following a double dissolution, all 76 senators face re-election. If there is an early House election outside the 12-month period in which Senate elections can occur, the synchronisation of the election will be disrupted, and there can be half-Senate elections without a concurrent House election. The last time this occurred was on
21 November 1970.
Quota size
The number of votes that a candidate must receive to be elected to the senate is referred to as a "quota". The quota is worked out by dividing the number of formal votes by one more than the number of vacancies to be filled and then adding one to the result. The 2019 senate election was a half senate election, so 6 senate vacancies were contested in each state. At this election, the quotas in each state were:
Proportional representation of the states vs one vote one value
Each state elects the same number of senators, meaning there is equal representation for each of the Australian states, regardless of population, so the Senate, like many upper Houses, does not adhere to the principle of
one vote one value
"One man, one vote" or "one vote, one value" is a slogan used to advocate for the principle of equal representation in voting. This slogan is used by advocates of democracy and political equality, especially with regard to electoral reforms like ...
.
Tasmania
Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...
, with a population of around 500,000, elects the same number of senators as
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
, which has a population of more than 8 million.
The proportional election system within each state ensures that the Senate incorporates more political diversity than the lower house (
House of Representatives
House of Representatives is the name of legislative bodies in many countries and sub-national entities. In many countries, the House of Representatives is the lower house of a bicameral legislature, with the corresponding upper house often ...
), which has historically been a
two party body. The elected membership of the Senate more closely reflects the first voting preference of the electorate as a whole than does the composition of the House of Representatives, despite the large discrepancies from state to state in the ratio of voters to senators. This often means that the composition of the Senate is different from that of the House of Representatives, contributing to the Senate's function as a
house of review.
With proportional representation, and the small majorities in the Senate compared to the generally larger majorities in the House of Representatives, and the requirement that the number of members of the House be "nearly as practicable" twice that of the Senate, a joint sitting after a double dissolution is more likely than not to lead to a victory for the House over the Senate. When the Senate had an odd number of senators retiring at an election (3 or 5), 51% of the vote would lead to a clear majority of 3 out of 5 per state. With an even number of senators retiring at an election, it takes 57% of the vote to win 4 out of 6 seats, which may be insurmountable. This gives the House an advantage in joint sittings but not in ordinary elections, where the Senate may be too evenly balanced to get House legislation through.
A party does not need the support of the Senate to form government (needing only a majority in the House of Representatives), however the Senate can block supply, effectively preventing the government from lawfully spending money. Whether a government facing a Senate that blocks
supply
Supply or supplies may refer to:
*The amount of a resource that is available
**Supply (economics), the amount of a product which is available to customers
**Materiel, the goods and equipment for a military unit to fulfill its mission
*Supply, as ...
is obliged to either resign or call an election was one of the major disputes of the
1975 constitutional crisis. However, even where the Senate does not block supply, they can still use their power to frustrate the legislative agenda of the government.
Parties
Political parties have played a major role in the operations of the Senate throughout its history. Some framers of the constitution intended that senators would give first priority to the interests of their states, placing state considerations above party interests. However, others involved in drafting the constitution – including
Alfred Deakin
Alfred Deakin (3 August 1856 – 7 October 1919) was an Australian politician who served as the second Prime Minister of Australia, prime minister of Australia from 1903 to 1904, 1905 to 1908, and 1909 to 1910. He held office as the leader of th ...
,
Isaac Isaacs
Sir Isaac Alfred Isaacs, (6 August 1855 – 11 February 1948) was an Australian lawyer, politician, and judge who served as the ninth Governor-General of Australia, in office from 1931 to 1936. He had previously served on the High Court of Au ...
, and
H. B. Higgins – correctly predicted that party considerations would soon dominate state interests.
Party discipline was important in the Senate from the first parliament, most notably with the formation of an
Australian Labor Party caucus after the inaugural
1901 election which required its members to vote in line with decisions of the majority. A two-party system became ensconced in both houses of parliament following the
"fusion" of the non-Labor parties in 1909, largely as a response to the discipline of the ALP. Votes on party lines soon became a regular feature of debate, with corresponding criticisms that the Senate had merely become a rubber stamp for the government rather than filling the role of a states' house.
The "block" voting system used for the Senate prior to electoral reform in 1948 contributed to uneven party representation in the Senate, with the party securing the majority of votes in a state typically winning all that state's Senate seats. After the emergence of the two-party system, there were only two elections between 1910 and 1949 where the government formed in the House of Representatives did not also hold a majority in the Senate. In both cases (
1913
Events January
* January – Joseph Stalin travels to Vienna to research his ''Marxism and the National Question''. This means that, during this month, Stalin, Hitler, Trotsky and Tito are all living in the city.
* January 3 &ndash ...
and
1929) the government lasted only a single term. The system produced "extreme and wildly fluctuating results". On five occasions, the government won all available seats at half-Senate elections; consecutive landslide victories could resulted in the opposition being reduced to a handful of seats, such as when the ALP was reduced to a single Senate seat after the
1919 election. These outcomes, while still uncommon, led the Senate to be perceived as a weak institution serving as a rubber stamp and contributed to calls for reform.
The system of proportional representation passed in 1948 and implemented at the
1949 election resulted in a more even balance of party representation. A largely unintended consequence of the reforms was the emergence of minor parties as a political force in the Senate, ending a period of 40 years where every elected senator had been a member of either the ALP or the various anti-Labor parties. The first minor party to achieve prominence and obtain the
balance of power in the Senate was the
Democratic Labor Party (DLP), formed after the
ALP split of 1955. The
Australian Democrats
The Australian Democrats is a centrist political party in Australia. Founded in 1977 from a merger of the Australia Party and the New Liberal Movement, both of which were descended from Liberal Party splinter groups, it was Australia's lar ...
and the
Australian Greens
The Australian Greens, commonly referred to simply as the Greens, are a Left-wing politics, left-wing green party, green Australian List of political parties in Australia, political party. As of 2025, the Greens are the third largest politica ...
have also held the balance of power at various points. This marked the start of a pattern of non-government control of the Senate, where neither the government nor the opposition held a majority of seats and the government was reliant on minor party and independent senators to pass legislation. Since 1962, the government has secured a Senate majority on only three occasions: after the
1975
It was also declared the ''International Women's Year'' by the United Nations and the European Architectural Heritage Year by the Council of Europe.
Events
January
* January 1 – Watergate scandal (United States): John N. Mitchell, H. R. ...
,
1977
Events January
* January 8 – 1977 Moscow bombings, Three bombs explode in Moscow within 37 minutes, killing seven. The bombings are attributed to an Armenian separatist group.
* January 10 – Mount Nyiragongo erupts in eastern Zaire (no ...
and
2004 elections.
Casual vacancies
Section 15 of the Constitution provides that a
casual vacancy
''The Casual Vacancy'' is a novel written by British author J. K. Rowling, published worldwide by the Little, Brown Book Group on 27 September 2012. It was Rowling's first publication since the ''Harry Potter'' series, her first novel apart fr ...
of a State senator shall be filled by the State Parliament. If the previous senator was a member of a particular political party the replacement must come from the same party, but the State Parliament may choose not to fill the vacancy, in which case Section 11 requires the Senate to proceed regardless. If the State Parliament happens to be in recess when the vacancy occurs, the Constitution provides that the State Governor can appoint someone to fill the place until fourteen days after the State Parliament resumes sitting.
Procedure
Work
The Australian Senate typically sits for 50 to 60 days a year. Most of those days are grouped into 'sitting fortnights' of two four-day weeks. These are in turn arranged in three periods: the autumn sittings, from February to April; the winter sittings, which commence with the delivery of the budget in the House of Representatives on the first sitting day of May and run through to June or July; and the spring sittings, which commence around August and continue until December, and which typically contain the largest number of the year's sitting days.
The senate has a regular schedule that structures its typical working week.
Dealing with legislation
All
bills must be passed by a majority in both the House of Representatives and the Senate before they become law. Most bills originate in the House of Representatives, and the great majority are introduced by the government.
The usual procedure is for notice to be given by a government minister the day before the bill is introduced into the Senate. Once introduced the bill goes through several stages of consideration. It is given a
first reading
A reading of a bill is a stage of debate on the bill held by a general body of a legislature.
In the Westminster system, developed in the United Kingdom, there are generally three readings of a bill as it passes through the stages of becoming, ...
, which represents the bill's formal introduction into the chamber.
The first reading is followed by debate on the principle or policy of the bill (the second reading debate). Agreement to the bill in principle is indicated by a second reading, after which the detailed provisions of the bill are considered by one of a number of methods (see below). Bills may also be referred by either House to their specialised standing or select committees. Agreement to the policy and the details is confirmed by a third and final reading. These processes ensure that a bill is systematically considered before being agreed to.
The Senate has detailed rules in its standing orders that govern how a bill is considered at each stage. This process of consideration can vary greatly in the amount of time taken. Consideration of some bills is completed in a single day, while complex or controversial legislation may take months to pass through all stages of Senate scrutiny. The Constitution provides that if the Senate vote is equal, the question shall pass in the negative.
Committees
In addition to the work of the main chamber, the Senate also has a large number of
committees
A committee or commission is a body of one or more persons subordinate to a deliberative assembly or other form of organization. A committee may not itself be considered to be a form of assembly or a decision-making body. Usually, an assembly o ...
which deal with matters referred to them by the Senate. These committees also conduct hearings three times a year in which the government's budget and operations are examined. These are known as estimates hearings. Traditionally dominated by scrutiny of government activities by non-government senators, they provide the opportunity for all senators to ask questions of ministers and public officials. This may occasionally include government senators examining activities of independent publicly funded bodies, or pursuing issues arising from previous governments' terms of office. There is however a convention that senators do not have access to the files and records of previous governments when there has been an election resulting in a change in the party in government. Once a particular inquiry is completed the members of the committee can then produce a report, to be tabled in Parliament, outlining what they have discovered as well as any recommendations that they have produced for the Government to consider.
The ability of the Houses of Parliament to establish committees is referenced in Section 49 of the Constitution, which states, "The powers, privileges, and immunities of the Senate and of the House of Representatives, and of the members and the committees of each House, shall be such as are declared by the Parliament, and until declared shall be those of the Commons House of Parliament of the United Kingdom, and of its members and committees, at the establishment of the Commonwealth."
Parliamentary committees can be given a wide range of powers. One of the most significant powers is the ability to summon people to attend hearings in order to give evidence and submit documents. Anyone who attempts to hinder the work of a Parliamentary committee may be found to be in
contempt of Parliament. There are a number of ways that witnesses can be found in contempt, these include; refusing to appear before a committee when summoned, refusing to answer a question during a hearing or to produce a document, or later being found to have lied to or misled a committee. Anyone who attempts to influence a witness may also be found in contempt.
Other powers include the ability to meet throughout Australia, to establish subcommittees and to take evidence in both public and private hearings.
Proceedings of committees are considered to have the same legal standing as proceedings of Parliament. They are recorded by
Hansard
''Hansard'' is the transcripts of parliamentary debates in Britain and many Commonwealth of Nations, Commonwealth countries. It is named after Thomas Curson Hansard (1776–1833), a London printer and publisher, who was the first official printe ...
, except for private hearings, and also operate under
Parliamentary privilege
Parliamentary privilege is a legal immunity enjoyed by members of certain legislatures, in which legislators are granted protection against civil or criminal liability for actions done or statements made in the course of their legislative duties ...
. Every participant, including committee members and witnesses giving evidence, is protected from being prosecuted under any civil or criminal action for anything they may say during a hearing. Written evidence and documents received by a committee are also protected.
Holding governments to account
One of the functions of the Senate, both directly and through its
committees
A committee or commission is a body of one or more persons subordinate to a deliberative assembly or other form of organization. A committee may not itself be considered to be a form of assembly or a decision-making body. Usually, an assembly o ...
, is to scrutinise government activity. The vigour of this scrutiny has been fuelled for many years by the fact that the party in government has seldom had a majority in the Senate. Whereas in the House of Representatives the government's majority has sometimes limited that chamber's capacity to implement executive scrutiny, the opposition and minor parties have been able to use their Senate numbers as a basis for conducting inquiries into government operations. When the
Howard government
The Howard government refers to the Government of Australia, federal executive government of Australia led by Prime Minister John Howard between 11 March 1996 and 3 December 2007. It was made up of members of the Liberal Party of Australia, Li ...
won control of the Senate in 2005, it sparked a debate about the effectiveness of the Senate in holding the government of the day accountable for its actions. Government members argued that the Senate continued to be a forum of vigorous debate, and its committees continued to be active. The Opposition leader in the Senate suggested that the government had attenuated the scrutinising activities of the Senate. The
Australian Democrats
The Australian Democrats is a centrist political party in Australia. Founded in 1977 from a merger of the Australia Party and the New Liberal Movement, both of which were descended from Liberal Party splinter groups, it was Australia's lar ...
, a minor party which frequently played mediating and negotiating roles in the Senate, expressed concern about a diminished role for the Senate's committees.
In addition to review of legislation, the ''Legislation Act 2003'' provides that the Senate may also disallow legislative instruments – typically regulations made by government ministers using powers delegated by relevant legislation. The same power is afforded to the House of Representatives, but is rarely exercised given the government's control of numbers in the lower house. The ''Legislation Act 2003'' provides that any senator may move a motion disallowing a legislative instrument, which if passed within 15 days has the effect of repealing the instrument. The government may not enact an equivalent legislative instrument for a period of six months following the disallowal.
Voting
Senators are called upon to vote on matters before the Senate. These votes are called ''divisions'' in the case of Senate business, or ''ballots'' where the vote is to choose a senator to fill an office of the Senate (such as the
President
President most commonly refers to:
*President (corporate title)
* President (education), a leader of a college or university
*President (government title)
President may also refer to:
Arts and entertainment Film and television
*'' Præsident ...
).
Party discipline in
Australian politics is strong, so divisions almost always are decided on party lines. Nevertheless, the existence of minor parties holding the balance of power in the Senate has made divisions in that chamber more uncertain than in the House of Representatives.
When a division is to be held, bells ring throughout the parliament building for four minutes, during which time senators must go to the chamber. At the end of that period the doors are locked and a vote is taken, by identifying and counting senators according to the side of the chamber on which they sit (ayes to the right of the chair, noes to the left). The whole procedure takes around eight minutes. Senators with commitments that keep them from the chamber may make arrangements in advance to be 'paired' with a senator of the opposite political party, so that their absence does not affect the outcome of the vote.
The Senate contains an even number of senators, so a tied vote is a real prospect (which regularly occurs when the party numbers in the chamber are finely balanced).
Section 23 of the Constitution requires that in the event of a tied division, the question is resolved in the negative. The system is however different for ballots for offices such as the President. If such a ballot is tied, the
Clerk of the Senate decides the outcome by the drawing of lots. In reality, conventions govern most ballots, so this situation does not arise.
Political parties and voting outcomes
The strength of party discipline is demonstrated by how rare it is for members to vote against the position taken by their party. The exceptions are where a
conscience vote
A conscience vote or free vote is a type of vote in a legislative body where legislators are allowed to vote according to their own personal conscience rather than according to an official line set down by their political party. In a parliamenta ...
is allowed by one or more of the political parties; and occasions where a member of a political party
crosses the floor of the chamber to vote against the instructions of their
party whip. Crossing the floor very rarely occurs, but is more likely in the Senate than in the House of Representatives.
When the government has a majority in the Senate, the importance of party discipline increases, as it is only backbenchers that may prevent the passage of government bills. While strong party discipline has been a feature of Australian politics since the emergence of the Labor Party in the early 1900s, as late as 1980 the Fraser government could not be assured that his party's majority in the Senate would translate to absolute control, with at least 12 senators prepared to vote against the government. Similarly, when the Howard government had a Senate majority between 2005 and 2007, the internal differences between members of the government coalition parties became more apparent. However, due to the increase in party discipline, only two senators in this period crossed the floor:
Gary Humphries on civil unions in the Australian Capital Territory, and
Barnaby Joyce
Barnaby Thomas Gerard Joyce (born 17 April 1967) is an Australian politician who was the leader of the National Party of Australia from 2016 to 2018 and again from 2021 to 2022. Joyce was the 17th deputy prime minister of Australia during both ...
on
voluntary student unionism
Voluntary student unionism (VSU), as it is known in Australia, or voluntary student membership (VSM), as it is known in New Zealand, is a policy under which membership of – and payment of membership fees to – university student organisations ...
. A more significant potential instance of floor crossing was averted when the government withdrew its Migration Amendment (Designated Unauthorised Arrivals) Bill, of which several government senators had been critical, and which would have been defeated had it proceeded to the vote. The controversy that surrounded these examples demonstrated both the importance of
backbencher
In Westminster system, Westminster and other parliamentary systems, a backbencher is a member of parliament (MP) or a legislator who occupies no Minister (government), governmental office and is not a Frontbencher, frontbench spokesperson ...
s in party policy deliberations and the limitations to their power to influence outcomes in the Senate chamber.
In September 2008, Barnaby Joyce became leader of the Nationals in the Senate, and stated that his party in the upper house would no longer necessarily vote with their Liberal counterparts.
Where the Houses disagree
Double dissolutions and joint sittings
If the Senate rejects or fails to pass a proposed law, or passes it with amendments to which the House of Representatives will not agree, and if after an interval of three months the Senate refuses to pass the same piece of legislation, the government may either abandon the bill or continue to revise it, or, in certain circumstances outlined in section 57 of the
Constitution
A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity, and commonly determines how that entity is to be governed.
When these pri ...
, the Prime Minister can advise the Governor-General to dissolve the entire parliament in a
double dissolution
A double dissolution is a procedure permitted under the Australian Constitution to resolve deadlocks in the bicameral Parliament of Australia between the House of Representatives (lower house) and the Senate (upper house). A double dissolutio ...
. In such an event, the entirety of the Senate faces re-election, as does the House of Representatives, rather than only about half the chamber as is normally the case. After a double dissolution election, if the bills in question are reintroduced, and if they again fail to pass the Senate, the Governor-General may agree to a ''joint sitting'' of the two Houses in an attempt to pass the bills.
Such a sitting has only occurred once, in 1974.
The double dissolution mechanism is not available for bills that originate in the Senate and are blocked in the lower house.
On 8 October 2003, the then Prime Minister
John Howard
John Winston Howard (born 26 July 1939) is an Australian former politician who served as the 25th prime minister of Australia from 1996 to 2007. He held office as leader of the Liberal Party of Australia. His eleven-year tenure as prime min ...
initiated public discussion of whether the mechanism for the resolution of deadlocks between the Houses should be reformed. High levels of support for the existing mechanism, and a very low level of public interest in that discussion, resulted in the abandonment of these proposals.
Allocating terms after a double dissolution
After a double dissolution election, section 13 of the Constitution requires the Senate to divide the senators into two classes, with the first class having a three-year "short term", and the second class a six-year "long term". The Senate may adopt any approach it wants to determine how to allocate the long and short terms, however two methods are currently 'on the table':
* "elected-order" method, where the senators elected first attain a six-year term. This approach tends to favour minor party candidates as it gives greater weight to their first preference votes;
or
* re-count method, where the long terms are allocated to those senators who would have been elected first if the election had been a standard half-Senate election.
This method is likely to be preferred by the major parties in the Senate where it would deliver more six-year terms to their members.
The Senate applied the "elected-order" method following the
1987 double dissolution election.
Since that time the Senate has passed resolutions on several occasions indicating its intention to use the re-count method to allocate seats at any future double dissolution, which
Green
Green is the color between cyan and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570 nm. In subtractive color systems, used in painting and color printing, it is created by a com ...
describes as a fairer approach but notes could be ignored if a majority of senators opted for the "elected-order" method instead.
In both double dissolution elections since 1987, the "elected order" method was used.
Blocking supply
The Senate has the same legislative power as the House of Representatives, except it may not originate or amend taxing or appropriation bills; they may only pass or reject them. The ability to block the annual appropriations bills required to fund the government ("supply") was exercised in the
1975 Australian constitutional crisis
The 1975 Australian constitutional crisis, also known simply as the Dismissal, culminated on 11 November 1975 with the dismissal from office of the Prime Minister of Australia, prime minister, Gough Whitlam of the Australian Labor Party (ALP), ...
. During the crisis, the
Opposition used its numbers in the Senate to defer supply bills, refusing to deal with them until an election was called for both Houses of Parliament, an election which it hoped to win. The
Prime Minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
of the day,
Gough Whitlam
Edward Gough Whitlam (11 July 191621 October 2014) was the 21st prime minister of Australia, serving from December 1972 to November 1975. To date the longest-serving federal leader of the Australian Labor Party (ALP), he was notable for being ...
, contested the legitimacy of the blocking and refused to resign. The crisis brought to a head two Westminster conventions that, under the Australian constitutional system, were in conflict – firstly, that a government may continue to govern for as long as it has the support of the
lower house
A lower house is the lower chamber of a bicameral legislature, where the other chamber is the upper house. Although styled as "below" the upper house, in many legislatures worldwide, the lower house has come to wield more power or otherwise e ...
, and secondly, that a government that no longer has access to supply must either resign or be dismissed. The deadlock ended in November 1975 when Governor-General
Sir John Kerr
Sir John Robert Kerr, (24 September 1914 – 24 March 1991) was an Australian barrister and judge who served as the 18th governor-general of Australia, in office from 1974 to 1977. He is primarily known for his involvement in the 1975 Austral ...
dismissed Whitlam's government and appointed Opposition Leader
Fraser Fraser may refer to:
Places Antarctica
* Fraser Point, South Orkney Islands
Australia
* Fraser, Australian Capital Territory, a suburb in the Canberra district of Belconnen
* Division of Fraser (Australian Capital Territory), a former federal ...
as Prime Minister, on the condition that elections for both Houses of parliament be held.
In 2014,
ABC elections analyst Antony Green noted that the blocking of supply alone cannot force a double dissolution. There must be legislation repeatedly blocked by the Senate which the government can then choose to use as a trigger for a double dissolution.
Current Senate
2019 election
In the 2019 half-Senate election, 40 seats were up for election: six from each state and two from each territory. The senate results were:
Liberal/
National coalition 19 seats,
Labor
Labour or labor may refer to:
* Childbirth, the delivery of a baby
* Labour (human activity), or work
** Manual labour, physical work
** Wage labour, a socioeconomic relationship between a worker and an employer
** Organized labour and the labour ...
13 seats,
Greens 6 seats,
One Nation 1 seat, and
Jacqui Lambie Network 1 seat.
2022 election
In the 2022 half–Senate election, 40 seats were up for election: six from each state and two from each territory. The senate results were: Liberal/National
coalition
A coalition is formed when two or more people or groups temporarily work together to achieve a common goal. The term is most frequently used to denote a formation of power in political, military, or economic spaces.
Formation
According to ''A G ...
15 seats (−4), Labor 15 seats (±0), Greens 6 seats (+3), Jacqui Lambie Network 1 seat (+1), One Nation 1 seat (±0),
United Australia 1 seat (+1), and
independent
Independent or Independents may refer to:
Arts, entertainment, and media Artist groups
* Independents (artist group), a group of modernist painters based in Pennsylvania, United States
* Independentes (English: Independents), a Portuguese artist ...
1 seat (+1). The composition of the Senate after the election was:
*
Liberal/
National Coalition
A coalition is formed when two or more people or groups temporarily work together to achieve a common goal. The term is most frequently used to denote a formation of power in political, military, or economic spaces.
Formation
According to ''A G ...
32 seats
*
Labor
Labour or labor may refer to:
* Childbirth, the delivery of a baby
* Labour (human activity), or work
** Manual labour, physical work
** Wage labour, a socioeconomic relationship between a worker and an employer
** Organized labour and the labour ...
26 seats
*
Greens 12 seats
*
Jacqui Lambie Network 2 seats
*
One Nation 2 seats
*
United Australia 1 seat
*Independent (
David Pocock) 1 seat
Historical party composition of the Senate
See also
*
2019 Australian federal election
*
Canberra Press Gallery
*
Clerk of the Australian Senate
*
Double dissolution
A double dissolution is a procedure permitted under the Australian Constitution to resolve deadlocks in the bicameral Parliament of Australia between the House of Representatives (lower house) and the Senate (upper house). A double dissolutio ...
*
Father of the Australian Senate
*
List of Australian Senate appointments
*
Members of the Australian Parliament who have served for at least 30 years
*
Members of the Australian Senate, 2022–2025
*
Women in the Australian Senate
Notes
References
Further reading
*
*
* John Halligan, Robin Miller and John Power, ''Parliament in the Twenty-first Century: Institutional Reform and Emerging Roles'', Melbourne University Publishing, 2007
*
External links
*
Australian Parliament – live broadcastingSenate StatsNetThe Biographical Dictionary of the Australian SenateAustralia's Upper Houses – ABC Rear VisionA podcast about the development of Australia's upper houses into STV proportional representation elected chambers.
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1901 establishments in Australia
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
Senate, Australian
Senate, Australian
Westminster system
1975 Australian constitutional crisis
Federal chambers