Provided that nothing contained in any enactment so extended shall apply to (a) any premises within the cantonment belonging to the Government; (b) any tenancy or other like relationship created by a grant from the Government in respect of premises within the cantonment taken on lease or requisitioned by the Government; or (2) The extension of any enactment under sub section (l) may be made from such earlier or future date as the Central Government may think fit: Provided that no such extension shall be made from a date earlier than (a) the commencement of such enactment, or (b) the establishment of the cantonment, or (c) the commencement of this Act, whichever is later: PG NO 591 (3) Where any enactment in force in any State relating to the control of rent and regulation of house accommodation is extended to a cantonment from a date earlier than the date on which such extension is made (hereafter referred to as the "earlier date"), such enactment, as in force on such earlier date, shall apply to such cantonment and, where any such enactment has been amended at any time after the earlier date but before the commencement of the Cantonments (Extension of Rent Control Laws) Amendment Act, 1972, such enactment, as amended shall apply to the cantonment on and from the date on which the enactment by which such amendment was made came into force.