1986 c.44. Section 7 was amended by the Gas Act 1995, section 5; the Utilities Act 2000, section 3(2), section 76 (1) to (7), section 108, Sch 6, Part 1, paragraphs 1, 4, Sch 8 and the Energy Act 2004, section 149(1), (5). Section 7ZA was inserted by the Energy Act 2004, section 149 (1), (6). Section 7A was inserted by the Gas Act 1995, section 6(1); it was amended by the Utilities Act 2000, section 3 (2), section 108, Sch 6, Part I, paras 1, 2(1), Sch 8 and by the Energy Act 2004, section 149(1), (7).