1977 c. 49; section 17 was substituted, and section 17A inserted, by the Health Act 1999 (c. 8) (“the 1999 Act”), section 12(1); section 18(1) and (1A) was substituted by the 1999 Act, section 12(3); section 126(4) was amended by the National Health Service and Community Care Act 1990 (c. 19) (“the 1990 Act”), section 65(2) and by the 1999 Act, Schedule 4, paragraph 37(6); see section 128(1), as amended by section 26(2)(i) and (g) of the 1990 Act, for the definitions of “prescribed” and “ regulations”. The functions of the Secretary of State under these provisions are, so far as exercisable in relation to Wales, transferred to the National Assembly for Wales by article 2(a) of, and the entry for the 1977 Act in Schedule 1 to, the National Assembly for Wales (Transfer of Functions) Order 1999, S.I. 1999/672, as amended by section 66(5) of the 1999 Act.