National Security Act, 1980
In this Act, unless the context otherwise requires,-
(a) "appropriate Government" means, as respects a detention order made by the Central Government or a person detained under such order, the Central Government, and as respects a detention order made by a State Government or by an officer subordinate to a State Government or as respects a person detained under such order, the State Government;
(b) "detention order" means an order made under section 3;
(c) "foreigner" has the same meaning as in the Foreigners Act, 1946;
(d) "person" includes a foreigner;
(e) "State Government", in relation to a Union territory, means the administrator thereof.