(1) The following provisions come into force on the day on which this Act is passed -

(a) section 21;

(b) section 23(2) to (7);

(c) section 26;

(d) this section;

(e) section 28;

(f) paragraph 19 of Schedule 4 and section 23(1) so far as relating to that paragraph;

(g) any other provision of this Act so far as necessary for enabling the exercise on or after the day on which this Act is passed of any power under Schedule 3 to make regulations or to issue codes of practice.

(2) The following provisions come into force on such day or days as the Secretary of State may by regulations appoint -

(a) sections 16, 17 and 18;

(b) section 19 and Schedule 2;