(1) Subject to subsection (2), this Act shall come into operation on the day on which it receives the Royal Assent.
(2) Sections 3 to 6 (inclusive), and Parts III to IX (inclusive), shall be deemed to have come into operation on 1 October 1972 and, subject to this Act, contributions under section 17 are payable to the Commonwealth, and benefits under this Act are payable by the Commonwealth, on and after that date accordingly.