(1) Each provision of the Principal Act mentioned in column (1) of the Schedule to this Act is hereby amended in the manner stated in column (2) of that Schedule opposite the mention of that provision in column (1).

(2) Notwithstanding section 20(3), this section, in so far as it relates to the first amendment of section 4 of the Principal Act, the first amendment of section 7 of that Act, the fifth amendment of Schedule 1 of that Act and the fourth amendment of Schedule 3 of that Act, shall be deemed to have come into operation on the 22nd day of January, 1971.