5. Coming into operation of enactments. -

(1) Where any Central Act is not expressed to come into operation on a particular day, then it shall come into operation on the day on which it receives the assent,-

(a) in the case of a Central Act made before the commencement of the Constitution, of the Governor-General, and

(b) in the case of an Act of Parliament, of the President.

(3) Unless the contrary is expressed, a Central Act or Regulation shall be construed as coming into operation immediately on the expiration of the day preceding its commencement.