Mental Health Act 1983

Type Public General Act
Publication 1983-05-09
Last updated 2026-04-06
State In force
Department Statute Law Database
articles Not indexed
Reform history JSON API
637

Words in s. 118(1) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(6)(a); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

638

Words in s. 118(1)(a) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 21, 56, Sch. 2 para. 9 (with Sch. 10); S.I. 2008/1900, art. 2(d) (with art. 3, Sch.); S.|. 2008/2561, {art. 2(b)} (with art. 3, Sch.)

639

Words in s. 118(1) substituted (1.4.2002) by 2000 c. 14, ss. 116, 122, Sch. 4 para. 9(6)(b); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

640

Words in s. 118(1)(a) inserted (1.4.1996) by 1995 c. 52, ss. 1(2), 7(2), Sch. 1, para. 16

641

Words in s. 118(1)(a) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 25 (with Sch. 10); S.I. 2008/1210, art. 2(b) (with art. 4)

642
644

S. 118(2A)-(2D) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 8, 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

646
651

Words in s. 119(2) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 35(2)(a)(i), 56 (with Sch. 10); S.I. 2008/1900, art. 2(k) (with art. 3, Sch.)

652

Words in s. 119(2)(a) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 35(2)(a)(ii), 56 (with Sch. 10); S.I. 2008/1900, art. 2(k) (with art. 3, Sch.)

653

Words in s. 119(2)(b) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 35(2)(a)(iii), 56 (with Sch. 10); S.I. 2008/1900, art. 2(k) (with art. 3, Sch.)

657

Words in s. 122(1) repealed (1.4.2000 for E.W.) by 1999 c. 8, s. 65, Sch. 4 para. 66, Sch. 5; S.I. 1999/2793, art. 2(3)(a), Sch. 3

663

Words in s. 126(3)(b) inserted (1.4.1996) by 1995 c. 52, ss. 1(2), 7(2), Sch. 1, para. 17

664

Words in s. 127(1) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(8); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

666
668

Words in s. 128(1) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 28 (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

669

Words in s. 129(1)(b) inserted (1.4.1996) by 1995 c. 52, ss. 1(2), 7(2), Sch. 1, para. 19

671

Words in s. 131(1) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(2); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

672

S. 131(2)-(5) substituted (1.1.2008) for s. 131(2) by Mental Health Act 2007 (c. 12), ss. 43, 56 (with Sch. 10); S.I. 2007/2798, art. 4

673

Words in s. 132(1)(2)(4) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(2); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

674
675

Words in s. 132(2) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 29 (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

676
677

Words in s. 133(1) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(2); S.I. 2001/4150, art. 3(3) (subject to transitional provisions in art. 4 and S.I. 2002/1493, art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

678

S. 133(1A)(1B) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 31 (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

679

Words in s. 134(1) substituted (26.3.2001) by 2000 c. 26, s. 127(4), Sch. 8 Pt. II para. 19(2); S.I. 2001/1148, art. 2, Sch. (with art. 34)

680

Words in s. 134(1)(b) substituted (1.4.2000) by 1999 c. 8, s. 65(1), Sch. 4 para. 68; S.I. 1999/2793, art. 2(3)(a), Sch. 3

681

Words in s. 134(1) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 14(4), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

682

Words in s. 134(2) substituted (1.4.2000) by 1999 c. 8, s. 65(1), Sch. 4 para. 68; S.I. 1999/2793, art. 2(3)(a), Sch. 3

683

Words in s. 134(3)(a) inserted (1.7.1999) by S.I. 1999/1820, art 4, Sch. 2 Pt. I, para. 71 (with art. 5); S.I. 1998/3178, art. 2

684

Words in s. 134(3)(a) inserted (2.12.1999) by 1998 c. 47, s. 99, Sch. 13, para. 5(2); S.I. 1999/3209, art. 2, Sch.

685

S. 134(3)(aa) inserted by The Government of Wales Act 2006 (Consequential Modifications and Transitional Provisions) Order 2007 (S.I. 2007/1388), art. 3, Sch. 1 para. 18 (the amendment comming into force immediately after the end of "the initial period" (which ended with the day of the first appointment of a First Minister on 25.5.2007) in accordance with art. 1(2)(3) of the amending S.I. and see ss. 46, 161(5) of Government of Wales Act 2006 (c. 32))

687

S. 134(3)(c) extended in part (1.7.1999) by S.I. 1999/1351, art. 17(2)(b) (with art. 18); S.I. 1998/3178, art. 2

694

Words in s. 134(3)(e) substituted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961), art. 3, Sch. para. 13(10)

695

Words in s. 134(3)(e) repealed (1.4.2008) by Local Government and Public Involvement in Health Act 2007 (c. 28), ss. 241, 245, Sch. 18 Pt. 18; S.I. 2008/461, art. 2(3), Sch.

697

Words in s. 134(3)(e) substituted (1.4.2001) by 2000 c. 43, s. 74, Sch. 7 Pt. II para. 74; S.I. 2001/919, art. 2(f)

699

S. 134(3)(ea)(eb) inserted (1.7.2002 for W. and 1.9.2003 for E.) by 2001 c. 15, ss. 67(1), 70(2), Sch. 5 para. 6(2) (with ss. 64(9), 65(4)); S.I. 2002/1475, art. 2(1), Sch. Pt. 2; S.I. 2003/2245, art. 2(b)

702

S. 134(3A) inserted (1.7.2002 for W. and 1.9.2003 for E.) by 2001 c. 15, ss. 67(1), 70(2), Sch. 5 para. 6(2) (with ss. 64(9), 65(4)); S.I. 2002/1475, art. 2(1), Sch. Pt. 2; S.I. 2003/2245, art. 2(b)

704

S. 134(3A)(b) substituted (1.4.2008 for certain purposes, 3.11.2008 for further purposes and otherwise 1.4.2009) by Mental Health Act 2007 (c. 12), ss. 30(3), 56 (with Sch. 10); S.I. 2008/745, art. 2(b)(ii); S.I. 2008/2561, art. 2(c) (with art. 3, Sch.); S.I. 2009/139, art. 2(a) (with Sch. paras. 3, 4)

707

Words in s. 134(9) inserted (26.3.2001) by 2000 c. 26, s. 127(4), Sch. 8 Pt. II para. 19(3)(a); S.I. 2001/1148, art. 2, Sch. (with art. 34)

708

Words in s. 134(9) substituted (26.3.2001) by 2000 c. 26, s. 127(4), Sch. 8 Pt. II para. 19(3)(b); S.I. 2001/1148, art. 2, Sch. (with art. 34)

709

Words in s. 135(1)(4) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 21, 56, Sch. 2 para. 10(a) (with Sch. 10); S.I. 2008/1900, art. 2(d) (with art. 3, Sch.); S.I. 2008/2561, art. 2(b) (with art. 3, Sch.)

713

S. 135(3A)(3B) inserted (30.4.2008) by Mental Health Act 2007 (c. 12), ss. 44(2), 56 (with Sch. 10); S.I. 2008/800, art. 2 (with art. 3)

717

Words in s. 135(6) substituted (1.4.2002) by 2000 c. 14, s. 116, Sch. 4 para. 9(9); S.I. 2001/4050, art. 3(3) (subject to art. 4); S.I. 2002/920, art. 3(3)(d) (subject to transitional provisions in Schs. 1-3 and art. 3(4)-(10))

718

Words in s. 136(2) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 21, 56, Sch. 2 para. 10(b) (with Sch. 10); S.I. 2008/1900, art. 2(d) (with art. 3, Sch.); S.I. 2008/2561, art. 2(b) (with art. 3, Sch.)

719

S. 136(3)(4) inserted (30.4.2008) by Mental Health Act 2007 (c. 12), ss. 44(3), 56 (with Sch. 10); S.I. 2008/800, art. 2 (with art. 3)

722

Words in s. 138(1)(a) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 21, 56, Sch. 2 para. 10(c) (with Sch. 10); S.I. 2008/1900, art. 2(d) (with art. 3, Sch.); S.I. 2008/2561, art. 2(b) (with art. 3, Sch.)

723

Words in s. 138(1)(b) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 32 (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

727

This version of this provision extends to England and Wales only; a separate version has been created for Scotland and Northern Ireland only

729

Words in s. 139(4) substituted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961), art. 3, Sch. para. 13(11)

735

For extent of s. 139 to Northern Ireland and of s. 139(1) to Scotland see ss. 146, 147

736

This version of this provision extends to Scotland and Northern Ireland only; a separate version has been created for England and Wales only

740

S. 140: title substituted (3.11.2008) by virtue of Mental Health Act 2007 (c. 12), ss. 31(4), 56 (with Sch. 10); S.I. 2008/1900, art. 2(h) (with art. 3, Sch.)

741

S. 140: functions of local authority may be responsibility of an executive of the authority (1.4.2000) by virtue of S.I. 2000/695, reg. 3(2)(b), Sch. 2

742

Words in s. 140 substituted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961), art. 3, Sch. para. 13(12)

743

Words in s. 140 inserted (1.10.2002) by 2002 c. 17, s. 2(5), Sch. 2 Pt. 2 para. 48(b); S.I. 2002/2478, art. 3(1)(d) (with saving in art. 3(3) and transitional provision in art. 4)

745

Words in s. 140 substituted (28.6.1995 for certain purposes, otherwise 1.4.1996) by 1995 c. 17, s. 2(1), Sch. 1, Pt. III, para. 107(12) (with ss. 2(3), 8)

746

S. 140(a)(b) substituted (3.11.2008) for words in s. 140 by Mental Health Act 2007 (c. 12), ss. 31(4), 56 (with Sch. 10); S.I. 2008/1900, art. 2(h) (with art. 3, Sch.)

747

S. 142 applied (21.1.1994) by S.I. 1993/3253, reg. R1(2).

749

Ss. 130A-130D inserted (1.4.2008 for ss. 130A, 130C for certain purposes, otherwise 3.11.2008 for W. and 1.4.2009 for E.) by Mental Health Act 2007 (c. 12), ss. 30(2), 56 (with Sch. 10); S.I. 2008/745, arts. 2(b)(i), 3(d): S.I. 2008/2561, art. 2(c) (with art. 3, Sch.); S.I. 2009/139, art. 2(a)

750
752

S. 142A inserted (1.4.2008 for E.W.) by Mental Health Act 2007 (c. 12), ss. 17, 56 (with Sch. 10); S.I. 2008/745, art. 3(a)

753

S. 142B inserted (24.7.2007) by Mental Health Act 2007 (c. 12), ss. 45(3), 56 (with Sch. 10); S.I. 2007/2156, art. 2

754

Words in s. 143(2) inserted (E.W) (1.10.1992) by Criminal Justice Act 1991 (c. 53, SIF 39:1), s. 27(3) (with s. 28); S.I. 1992/333, art. 2(2), Sch. 2

755

Words in s. 143(2) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 37(5)(a)(i), 56 (with Sch. 10); S.I. 2008/1900, art. 2(l) (with art. 3, Sch.)

756

Words in s. 143(2) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 37(5)(a)(ii), 56 (with Sch. 10); S.I. 2008/1900, art. 2(l) (with art. 3, Sch.)

757

Words in s. 143(2) substituted (28.6.1995 for certain purposes, otherwise 1.4.1996) by 1995 c. 17, ss. 2(1)(3), 8, Sch. 1 Pt. III para. 107(13)

758

Words in s. 143(2) substituted (1.4.2008) by Mental Health Act 2007 (c. 12), ss. 47(2), 56 (with Sch. 10)); S.I. 2008/745, art. 3(g)

759

Words in s. 143(3) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 37(5)(b)(i), 56 (with Sch. 10); S.I. 2008/1900, art. 2(l) (with art. 3, Sch.)

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