Section 21A(1) in Punjab General Sales Tax Act, 1948
(1)The Commissioner or the Officer on whom powers of the Commissioner under sub-section (1) of section 21 have been conferred by the State Government may, at any time within two years from the date of any order passed by him, of his own motion, rectify any mistake apparent from the record, and shall within a like period rectify any such mistake which has been brought to his notice by any person affected by such order:Provided that no such rectification shall be made if it has the effect of enhancing the tax or reducing the amount of refund, unless the Commissioner or the Officer on whom the powers of the Commissioner under sub- section (1) of section 21 have been conferred by the State Government has given notice in writing to such person of his intention to do so and has allowed such person a reasonable opportunity of being heard.
