Section 12A(3) in The Conservation of Foreign Exchange and Prevention of Smuggling Activities Act, 1974
(3)The question whether the detention of any person in respect of whom a declaration has been made under sub-section (2) continues to be necessary for effectively dealing with the emergency shall be reconsidered by the appropriate Government within four months from the date of such declaration and thereafter at intervals not exceeding four months, and if, on such reconsideration, it appears to the appropriate Government that the detention of the person is no longer necessary for effectively dealing with the emergency, the Government may revoke the declaration.