National Security Act 1980
Section 2 :
Definitions :
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 (31 of 1946);
(d) person includes a foreigner;
(e) State Government, in relation to a Union territory, means the administrator thereof.