http://www.legislation.gov.uk/ukpga/1986/44/section/8JGas Act 1986Gas Act 19861986-07-25texttext/xmlenStatute Law Database2026-08-10Expert Participation2025-11-13 Gas Act 1986s. 23D(2)(d) and wordEnergy Act 2013s. 138(4)(c)(iii)s. 156(1)Gas Act 1986s. 41E(6)(d) and wordEnergy Act 2013s. 138(4)(f)(ii)s. 156(1)Gas Act 1986s. 27(1ZA)(aa)The Competition (Amendment etc.) (EU Exit) (No. 2) Regulations 2019 (expired—not approved)reg. 17reg. 1(1)Gas Act 1986s. 5(1)(ca)Energy Act 2023s. 168(2)(b)s. 334(1)Gas Act 1986s. 5(10A)Energy Act 2023s. 168(2)(c)s. 334(1)Gas Act 1986s. 15ACompetition and Service (Utilities) Act 1992s. 17s. 56(2) Part I8J1This section applies in relation to any period for which a person—aholds a licence under section 7 or 7ZA; andbis certified.2If the person is certified on the first, second, ... fifth or sixth certification ground in section 8G, the person is designated as a gas transmission system operator for the purposes of the Gas Regulation.3If the person is certified on the third certification ground in section 8G, the independent system operator nominated in the application for certification is designated as a gas transmission system operator for the purposes of the Gas Regulation.4As soon as is reasonably practicable after a person is designated by virtue of this section, the Authority must notify the designation to—athe person designated; and bthe Secretary of State; ...c. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pt. I: definition of "public gas supplier" applied (E.W.) (1.12.1991) by Water Resources Act 1991 (c. 57, SIF 130), ss. 208(3)(b), 225(2) (with ss. 16(6), 179, 222(3), Sch. 22 para. 1, Sch. 23 para. 6)Pt. I: definition of "public gas supplier" applied (E.W.) (1.12.1991) by Water Resources Act 1991 (c. 57, SIF 130), ss. 178, 225(2), Sch. 22 para. 1(4)(e) (with ss. 16(6), 179, 222(3), Sch. 22 para. 1, Sch. 23 para. 6)Pt. I applied (1.3.1996) by 1995 c. 45, s. 6(7); S.I. 1996/218, art. 2Pt. I applied (1.3.1996) by 1995 c. 45, s. 16(1), Sch. 4 para. 1; S.I. 1996/218, art. 2Word in s. 8J(4)(a) inserted (31.12.2020) by The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(5)(a) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)S. 8J(4)(c) and word omitted (31.12.2020) by virtue of The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(5)(b) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)Ss. 8C-8Q and cross-heading inserted (10.11.2011) by The Electricity and Gas (Internal Markets) Regulations 2011 (S.I. 2011/2704), regs. 1(1), 4Words in s. 8J(3) substituted (31.12.2020) by The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(4) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)Words in s. 8J(2) substituted (31.12.2020) by The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(3)(b) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)Word in s. 8J(2) omitted (31.12.2020) by virtue of The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(3)(a) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)Words in s. 8J heading substituted (31.12.2020) by The Electricity and Gas etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/530), regs. 1(1), 17(2) (with reg. 17(6)(7)) (as amended by S.I. 2020/1016, regs. 1(2), 3(6)); 2020 c. 1, Sch. 5 para. 1(1)