Section 2(60)(a) in The Punjab General Clauses Act, 1898
(a)in the case of a Punjab Act made before the commencement of the Constitution, it shall come into operation, if it is an Act of the Legislature, on the day on which the assent thereto of the Governor, the Governor-General, or His Majesty, as the case may require, is first published in the Official Gazette and, if it is an Act of the Governor, on the day on which it is first published in the Official Gazette; and