Part 4

Market Studies and Market Investigations
Chapter 3

Enforcement

Undertakings in lieu

Undertakings in lieu: procedural requirements
155
1
Before accepting an undertaking under section 154A (other than an undertaking under that section which varies an undertaking under that section but not in any material respect), the CMA shall—
a
publish notice of the proposed undertaking; and
b
consider any representations made in accordance with the notice and not withdrawn.
2
A notice under subsection (1) shall state—
a
that the CMA proposes to accept the undertaking;
b
the purpose and effect of the undertaking;
c
the situation that the undertaking is seeking to deal with;
d
any other facts which the CMA considers justify the acceptance of the undertaking;
e
a means of gaining access to an accurate version of the proposed undertaking at all reasonable times; and
f
the period (not less than 15 days starting with the date of publication of the notice) within which representations may be made in relation to the proposed undertaking.
3A
The matters to be included in a notice under subsection (1) by virtue of subsection (2) include, in particular, the adverse effect on competition, and any detrimental effect on customers so far as resulting from the adverse effect on competition, which the CMA has identified.
4
The CMA shall not accept the undertaking with modifications unless it—
a
publishes notice of the proposed modifications; and
b
considers any representations made in accordance with the notice and not withdrawn.
5
A notice under subsection (4) shall state—
a
the proposed modifications;
b
the reasons for them; and
c
the period (not less than 7 days starting with the date of the publication of the notice under subsection (4)) within which representations may be made in relation to the proposed modifications.
6
If, after publishing notice under subsection (1) or (4), the CMA decides—
a
not to accept the undertaking concerned; and
b
not to proceed by virtue of subsection (8) or (9);
it shall publish notice of that decision.
7
As soon as practicable after accepting an undertaking to which this section applies, the CMA shall—
a
serve a copy of the undertaking on any person by whom it is given; and
b
publish the undertaking.
8
The requirements of subsection (4) (and those of subsection (1)) shall not apply if the CMA—
a
has already published notice under subsection (1) but not subsection (4) in relation to the proposed undertaking; and
b
considers that the modifications which are now being proposed are not material in any respect.
9
The requirements of subsection (4) (and those of subsection (1)) shall not apply if the CMA—
a
has already published notice under subsections (1) and (4) in relation to the matter concerned; and
b
considers that the further modifications which are now being proposed do not differ in any material respect from the modifications in relation to which notice was last given under subsection (4).
10
Paragraphs 6 to 8 (but not paragraph 9) of Schedule 10 (procedural requirements before terminating undertakings) shall apply in relation to the proposed release of undertakings under section 154A (other than in connection with accepting an undertaking under that section which varies or supersedes an undertaking under that section) as they apply in relation to the proposed release of undertakings under section 73.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1988 c. 41, Sch. 7 para. 20(5)-(8) (as substituted by Enterprise Act 2002 (c. 40), ss. 185, 279, Sch. 11 para. 11(3); S.I. 2003/1397, art. 2(1), Sch. (with art. 8)
Pt. 4 (ss. 131-184) modified (20.6.2003) by S.I. 1996/275 (N.I. 2), art. 23(2A)(2B) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 22(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1993 c. 43, s. 67(2A)(2B) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 21(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by S.I. 1992/231 (N.I. 1), art. 46(2A)(2B) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 20(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1991 c. 56, s. 31(4) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 19(3)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1991 c. 56, s. 31(2A) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 19(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1984 c. 12, s. 50(2B) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 16(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (20.6.2003) by 1989 c. 29, s. 43(2B) (as substituted by Enterprise Act 2002 (c. 40), ss. 168(9), 279, Sch. 9 para. 18(2)); S.I. 2003/1397, art. 2(1), Sch.
Pt. 4 (ss. 131-184) modified (25.7.2003 for certain purposes and 29.12.2003 for certain purposes) by Communications Act 2003 (c. 21), ss. 370(3), 411(2)(3) (with transitional provisions in Sch. 18); S.I. 2003/1900, arts. 1(2), 2(1), 3(1), Sch. 1 (with arts. 3-6 (as amended (8.12.2003) by S.I. 2003/3142, art. 1(3))); S.I. 2003/3142, art. 3(2)
Pt. 4 (ss. 131-184) modified (N.I.) (1.4.2007) by The Water and Sewerage Services (Northern Ireland) Order 2006 (S.I. 2006/3336 (N.I. 21)), arts. 1(2)(3), 29(4) (with arts. 8(9), 121, 307); S.R. 2007/194, art. 2(2), Sch. 1 Pt. 2 (with Sch. 2)
Pt. 4 modified (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 73(3), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)
Pt. 4 functions made exercisable concurrently (6.4.2013) by Civil Aviation Act 2012 (c. 19), ss. 60(2), 110(1) (with s. 77(1)-(3), Sch. 10 paras. 12, 17); S.I. 2013/589, art. 2(1)-(3)
Pt. 4 modified in part (6.4.2013) by Civil Aviation Act 2012 (c. 19), ss. 60(3), 110(1) (with ss. 60(4), 77(1)-(3), Sch. 10 paras. 12, 17); S.I. 2013/589, art. 2(1)-(3)
Pt. 4 modified (1.4.2014) by Enterprise and Regulatory Reform Act 2013 (c. 24), s. 103(3), Sch. 4 para. 57; S.I. 2014/416, art. 2(1)(c) (with Sch.)
Pt. 4 certain functions made exercisable concurrently (1.4.2014) by Financial Services (Banking Reform) Act 2013 (c. 33), s. 59(1)-(5), 148(5); S.I. 2014/823, art.
Pt. 4 modified by 1986 c. 44, s. 36A (as amended (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 50(4)(d) (with art. 3))
Pt. 4 modified by 1989 c. 29, s. 43(2B) (as amended (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 65(4)(d) (with art. 3))
Pt. 4 modified by 1991 c. 56, s. 31(4) (as amended (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 84(5)(d) (with art. 3))
Pt. 4 modified by 1993 c. 43, s. 67(4)(d) (as amended (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 105(4)(d) (with art. 3))
Pt. 4 modified by 2000 c. 38, s. 86(4A) (as inserted (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 154(6) (with art. 3))
Pt. 4 modified by 2012 c. 7, s. 73(3)(b) (as substituted (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 189(4)(c) (with art. 3))
Pt. 4 modified by 2012 c. 19, s. 60(3A) (as inserted (1.4.2014) by The Enterprise and Regulatory Reform Act 2013 (Competition) (Consequential, Transitional and Saving Provisions) Order 2014 (S.I. 2014/892), art. 1(1), Sch. 1 para. 197(5) (with art. 3))
Words in Pt. 4 heading inserted (1.4.2014) by Enterprise and Regulatory Reform Act 2013 (c. 24), s. 103(3), Sch. 12 para. 8; S.I. 2014/416, art. 2(1)(d) (with Sch.)
Word in s. 155(1)-(4) substituted (1.4.2014) by Enterprise and Regulatory Reform Act 2013 (c. 24), s. 103(3), Sch. 5 para. 188 (with s. 28); S.I. 2014/416, art. 2(1)(d) (with Sch.)
Word in s. 155(6)-(9) substituted (1.4.2014) by Enterprise and Regulatory Reform Act 2013 (c. 24), s. 103(3), Sch. 5 para. 188 (with s. 28); S.I. 2014/416, art. 2(1)(d) (with Sch.)
Pt. 4: certain functions made exercisable concurrently (26.12.2023) by Energy Act 2023 (c. 52), ss. 36(1)-(3), 334(3)(a) (with s. 38)
S.154A and cross-heading substituted for s.154 and cross-heading (1.1.2025) by Digital Markets, Competition and Consumers Act 2024 (c. 13), s. 339(1), Sch. 8 para. 8; S.I. 2024/1226, regs. 1(2), 2(1)(12) (with Sch. para. 9, 20)
S. 155(3A) substituted for s. 155(3) (1.1.2025) by Digital Markets, Competition and Consumers Act 2024 (c. 13), s. 339(1), Sch. 8 para. 9(3); S.I. 2024/1226, regs. 1(2), 2(1)(12) (with Sch. para. 9, 20)
Word in s. 155(1) substituted (1.1.2025) by Digital Markets, Competition and Consumers Act 2024 (c. 13), s. 339(1), Sch. 8 para. 9(2); S.I. 2024/1226, regs. 1(2), 2(1)(12) (with Sch. para. 9, 20)
Word in s. 155(10) substituted (1.1.2025) by Digital Markets, Competition and Consumers Act 2024 (c. 13), s. 339(1), Sch. 8 para. 9(4); S.I. 2024/1226, regs. 1(2), 2(1)(12) (with Sch. para. 9, 20)