National Command Authority may refer to:
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National Command Authority (Pakistan)
The National Command Authority (NCA) is the authority responsible for safeguarding the national security of Pakistan through command, control and operational decisions regarding Pakistan and weapons of mass destruction, Pakistan's nuclear weapo ...
, nuclear command and control agency headed by the prime minister
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National Command Authority (United States)
The National Command Authority (NCA) is a term that was formerly used by the Department of Defense of the United States to refer to the ultimate source of lawful military orders.
The NCA was first alluded to in a 1960 Department of Defense docume ...
, Department of Defense term formerly used to refer to the president in the context of nuclear weapons
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