(3) When making an order of detention under this Act against any person (including a foreigner) after the commencement of this section, the Central Government or the State Government or, as the case may be, the officer making the order of detention shall consider whether the detention of such person under this Act is necessary for dealing effective by with the emergency and if, on such consideration, the Central Government or the State Government or, as the case may be, the officer is satisfied that it is necessary to detain such person for effectively dealing with the emergency, that Government or officer May make a declaration to that effect and communicate a copy of the declaration to the person concerned: Provided that where such declaration is made by an officer it shall be reviewed by the State Government to which such officer is subordinate within fifteen days from the date of making of the declaration and such declaration shall cease to have effect unless it is confirmed by the State Government, after such review, within the said period of fifteen days".