(1) The laws specified in the Schedule to this Act shall be, and shall be deemed always to have been, as valid as if the provisions contained therein relating to cesses or other taxes on minerals had been enacted by Parliament and such provisions shall be deemed to have remained in force up to the 4th day of April, 1991.
(2) Notwithstanding any judgment, decree or order of any court, all actions taken, things done, rules made, notifications issued or purported to have been taken, done, made or issued and cesses or other taxes on minerals realised under any such laws shall be deemed to have been validly taken, done, made, issued or realised, as the case may be, as if this section had been in force at all material times when such actions were taken, things were done, rules were made, notifications were issued, or cesses or other taxes were realised, and no suit or other proceeding shall be maintained or continued in any court for the refund of the cesses or other taxes realised under any such laws.
(3) For the removal of doubts, it is hereby declared that nothing in sub-section (2) shall be construed as preventing any person from claiming refund of any cess or tax paid by him in excess of the amount due from him under any such laws.