Notwithstanding any judgment, decree or order of any court to the contrary, rule 49 of the Central Industrial Security Force Rules, 1969 published with the notification of the Government of India in the Ministry of Home Affairs number S.O. 4632, dated the 12th November, 1969 shall be deemed to be, and to have always been, made under the principal Act as amended by this Act as if the principal Act as so amended had been in force at all material times before the commencement of this Act and accordingly the disposal of any revision petition under the said rule 49 before the commencement of this Act or any order made or purporting to have been made or any action or thing taken or done in or under such petition shall not be deemed to be invalid or ever to have become invalid merely on the ground that the Central Government had no power under the principal Act to make the said rule 49.