5. ¹[(1) Where any Act of Parliament is not expressed to come into operation on any particular day, then it shall come into operation,(a) in the case of an Act of Parliament to which this Act was applicable before the 26th day of March, 1971, on the date on which it receives the assent; and (b) in the case of any other Act of Parliament, the day on which the assent is first published in the official Gazette;] (2) ²[Omitted by the Central Laws Order, 1961, Article 2 and Schedule.] (3) Unless the contrary is expressed, [an Act of Parliament] or Regulation shall be construed as coming into operation immediately on the expiration of the day preceding its commencement.