C1Pt. 1: certain functions made exercisable concurrently (26.11.1998 for certain purposes and prosp. otherwise) by 1984 c. 12, s. 50(3) (as substituted by 1998 c. 41, s. 66(5), Sch. 10 Pt. II para. 2(6) (with s. 73); S.I. 1998/2750, art. 2)

C2Pt. 1 (except ss. 38(1)-(6), 51) amended (1.2.2001) by 2000 c. 38, ss. 86(1)(3), 89 (with ss. 105(2)(d)(5), 106); S.I. 2001/57, art. 3(1), Sch. 2 Pt. 1

C3Pt. 1 (except ss. 38(1)-(6), 51, 52(6) and (8) and 54) amended (1.2.2001) by 2000 c. 38, s. 86(4)(b)(5) (with ss. 105(2)(d)(5), 106); S.I. 2001/57, art. 3(1), Sch. 2 Pt. 1

Pt. 1 (except ss. 38(1)-(6), 51) amended (1.2.2001) by 2000 c. 38, s. 86(7)(b) (with ss. 105(2)(d)(5), 106); S.I. 2001/57, art. 3(1), Sch. 2 Pt. 1

C4Pt. 1 modified (25.7.2003 for specified purposes, 29.12.2003 in so far as not already in force) by Communications Act 2003 (c. 21), ss. 371(3), 411(2) (with Sch. 18); S.I. 2003/1900, arts. 1(2), 2(1), Sch. 1 (with art. 3) (as amended by S.I. 2003/3142, art. 1(3)); S.I. 2003/3142, art. 3(2) (with art. 11)

C5Pt. 1 certain functions made exercisable concurrently by 1998 c. 41, s. 67(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 6(2)(a))

C6Pt. 1 certain functions made exercisable concurrently by 1991 c. 56, s. 31(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 4(2)(a))

C7Pt. 1 certain functions made exercisable concurrently by S.I. 1992/231 (N.I. 1) art. 46(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 5(2)(a))

C8Pt. 1 certain functions made exercisable concurrently by 1986 c. 44, s. 36A(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 1(2)(a))

C9Pt. 1 restricted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), regs. 1(a), 9(2)

C10Pt. 1 certain functions made exercisable concurrently by 1989 c. 29, s. 43(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 3(2)(a))

C11Pt. 1 certain functions made exercisable concurrently by S.I. 1996/275 (N.I. 2), art. 23(3) (as substituted (1.5.2004) by The Competition Act 1998 and Other Enactments (Amendment) Regulations 2004 (S.I. 2004/1261), reg. 1(a), Sch. 2 para. 9(2)(a))

C12Pt. 1 certain functions made exercisable concurrently (1.4.2007) by The Water and Sewerage Services (Northern Ireland) Order 2006 (S.I. 2006/3336), arts. 1(2), 29(3) (with arts. 8(8), 121(3), 307); S.R. 2007/194, art. 2(2), Sch. Pt. 2 (with Sch. 2)

C13Pt. 1 modified (1.4.2007) by The Water and Sewerage Services (Northern Ireland) Order 2006 (S.I. 2006/3336), arts. 1(2), 29(5) (with arts. 8(8), 121(3), 307); S.R. 2007/194, art. 2(2), Sch. Pt. 2 (with Sch. 2)

C14Pt. 1 modified (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 72(3), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

C15Pt. 1 functions made exercisable concurrently (6.4.2013) by Civil Aviation Act 2012 (c. 19), ss. 62(1)-(3), 110(1) (with s. 77(1)-(3), Sch. 10 paras. 12, 17); S.I. 2013/589, art. 2(1)-(3)

C16Pt. 1 modified in part (6.4.2013) by Civil Aviation Act 2012 (c. 19), ss. 62(4), 110(1) (with ss. 62(5), 77(1)-(3), Sch. 10 paras. 12, 17); S.I. 2013/589, art. 2(1)-(3)

C17Pt. 1 certain functions made exercisable concurrently by 2000 c. 8, s. 234J (as inserted (1.11.2014 for specified purposes, 1.4.2015 so far as not already in force) by Financial Services (Banking Reform) Act 2013 (c. 33), s. 148(5), Sch. 8 para. 3; S.I. 2014/2458, arts. 2(b)(aa)(i), 3(b)(v))

C18Pt. 1 certain functions made exercisable concurrently (1.11.2014 for specified purposes, 1.4.2015 so far as not already in force) by Financial Services (Banking Reform) Act 2013 (c. 33), ss. 61(2), 148(5); S.I. 2014/2458, arts. 2(a)(i), 3(b)(ii)

C19Pt. 1: certain functions made exercisable concurrently (26.12.2023) by Energy Act 2023 (c. 52), ss. 37, 334(3)(a) (with s. 38)

C20Pt. I Ch. I excluded (temp.) (11.1.2021) by The Competition Act 1998 (Groceries) (Public Policy Exclusion) Order 2020 (S.I. 2020/1568), arts. 1, 4 (with art. 7)

I1S. 1 partly in force; s. 1 was not in force at Royal Assent, see. s. 76(2)(3); s. 1(b) to (d) in force at 1.3.2000 by S.I. 2000/344, art. 2, Sch.

I2S. 1(a) in force at 10.3.2013 by S.I. 2013/284, art. 2(a)