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
56

Words in s. 15(3) repealed (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 55, 56, Sch. 11 Pt. 1 (with Sch. 10); S.I. 2008/1900, art. 2(p) (with art. 3, Sch.)

57
59

Words in s. 17(1) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(3)(a)(i), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

60
62

Words in s. 17(3) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(3)(b), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

63

Words in s. 17(4) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(3)(c)(i), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

64
65

Words in s. 17(5) omitted (1.4.1996 with application as mentioned in s. 3(3) of the omitting Act)) by virtue of 1995 c. 52, ss. 3(1)(3), 7(2)

73

For extent of s. 18 see 146, 147

76

S. 18(4) substituted (1.4.1996) by 1995 c. 52, ss. 2(1), 7(2)

83

Words in s. 19(3) inserted (1.10.2007) by Mental Health Act 2007 (c. 12), ss. 46(2), 56 (with Sch. 10); S.I. 2007/2798, art. 2(g)

85

Words in s. 19(3) inserted (1.10.2007) by Mental Health Act 2007 (c. 12), ss. 46(2), 56 (with Sch. 10); S.I. 2007/2798, art. 2(g)

86

Ss. 17A-17G inserted (1.4.2008 s. 17F for certain purposes, otherwise 3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32(2), 56 (with Sch. 10); S.I. 2008/745, art. 2(c)(i); S.I. 2008/1900, art. 2(i) (with art. 3, Sch. )

87

S. 19A inserted (1.4.2008 for certain purposes, otherwise 3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 4 (with Sch. 10); S.I. 2008/745, art. 2(c)(ii); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

89

Words in s. 20(3)(5) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(4)(a), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

92

S. 20(4)(b) and word "and" at the end of that paragraph repealed (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 4(4)(a), 55, 56, Sch. 11 Pt. 2 (with Sch. 10); S.I. 2008/1900, art. 2(b)(p) (with art. 3, Sch.)

93

S. 20(4)(d) and preceding word inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 4(4)(b), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

96

Words in s. 20(6) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(4)(c), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

101

Ss. 21, 21A, 21B substituted (1.4.1996) for s. 21 by 1995 c. 52, ss. 2(2), 7(2)

108
117

S. 21B(10): definition of "appropriate medical officer" repealed (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(5)(b), 56, Sch. 11 Pt. 3 (with Sch. 10); S.I. 2008/1900, art. 2(b)(p) (with art. 3, Sch.)

118

S. 21B(10): definition of "the appropriate body" substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 8(8)(a) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

119

S. 21B(10): definition of "the relevant conditions" substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 8(8)(b) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

121

For extent of s. 22 see ss. 146, 147

122

Words in s. 23(1) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 10(2) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

123

S. 23(1A)(1B) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 10(3) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

124

Words in s. 23(2)(a)(b) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(6), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

125

S. 23(2)(c) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 10(4) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

127

Words in s. 23(4) inserted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961, art. 3, Sch. para. 13(2)(b)

130

Words in s. 23(5) inserted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961, art. 3, Sch. para. 13(2)(c)

131

Words in s. 23(5)(a) substituted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961, art. 3, Sch. para. 13(2)(d)(i)

132

Words in s. 23(5)(a) substituted (1.4.2007) by The References to Health Authorities Order 2007 (S.I. 2007/961, art. 3, Sch. para. 13(2)(d)(ii)

133

Words in s. 23(5)(a) substituted (1.4.2007) by virtue of The References to Health Authorities Order 2007 (S.I. 2007/961), art. 3, Sch. para. 13(2)(d)(iii)

136

Words in s. 23(6) substituted (24.7.2007) by Mental Health Act 2007 (c. 12), ss. 45(1), 56 (with Sch. 10); S.I. 2007/2156, art. 2

137

Words in s. 24(1) inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 32, 56, Sch. 3 para. 11(2) (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

138

Words in s. 24 inserted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(7), 56, (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

139

Words in s. 24(2)(4) inserted (1.4.1996) by 1995 c .52, ss. 1(2), 7(2), Sch. 1, para. 1

141

Words in s. 25(1) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(8)(a), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

142

Words in s. 25(1) substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 9(8)(b), 56 (with Sch. 10); S.I. 2008/1900, art. 2(b) (with art. 3, Sch.)

145

S. 20: cross-heading substituted (3.11.2008) by virtue of Mental Health Act 2007 (c. 12), ss. 32(3), 56 (with Sch. 10); S.I. 2008/1900, art. 2(i) (with art. 3, Sch.)

157

Ss. 25A-25J inserted (1.4.1996) by 1995 c. 52, ss. 1(1), 7(2)

158
159

S. 26(2)(a)(b) substituted (14.10.1991) by S.I. 1991/1881 art.3

162

In s. 26(5) the word “or” and paragraph (d) repealed (14.10.1991) by Children Act 1989 (c. 41, SIF 20), s. 108(7), Sch. 15 (with Sch. 14 paras. 1(1), 27(4)); S.I. 1991/828, art. 3(2)

163

Words in s. 26(6) substituted (1.12.2007) by Mental Health Act 2007 (c. 12), ss. 26(4)(a), 56, (with Sch. 10); S.I. 2007/2798, art. 3

164

Words in s. 26(6) substituted (1.12.2007) by Mental Health Act 2007 (c. 12), {ss. 26(4(b))}, 56, (with Sch. 10); S.I. 2007/2798, art. 3

165

Words in s. 26(7)(b) substituted (1.12.2007) by Mental Health Act 2007 (c. 12), ss. 26(5), 56, (with Sch. 10); S.I. 2007/2798, art. 3

167

Words in s. 27 inserted (1.12.2007) by Mental Health Act 2007 (c. 12), ss. 26(6), 56 (with Sch. 10); S.I. 2007/2798, art. 3

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