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Mental Health Act 1983

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Changes to legislation:

Mental Health Act 1983, Section 1 is up to date with all changes known to be in force on or before 23 April 2024. There are changes that may be brought into force at a future date. Changes that have been made appear in the content and are referenced with annotations. Help about Changes to Legislation

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Revised legislation carried on this site may not be fully up to date. Changes and effects are recorded by our editorial team in lists which can be found in the ‘Changes to Legislation’ area. Where those effects have yet to be applied to the text of the legislation by the editorial team they are also listed alongside the legislation in the affected provisions. Use the ‘more’ link to open the changes and effects relevant to the provision you are viewing.

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Changes and effects yet to be applied to the whole Act associated Parts and Chapters:

  • Act applied by 1996 c. 46 Sch. 2 para. 9(replacing1968 c 20 s. 23) (Act applied (prosp.) by 1968 c. 20, s. 23(4) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2, para. 9 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))
  • Act applied by 1996 c. 46 Sch. 2 para. 4(replacing1957 c 53 s. 63) (Act applied (prosp.) by 1957 c. 53, s. 63C(6) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2, para. 4 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))
  • Act applied by 1996 c. 46 Sch. 2 para. 1(replacing1955 c 19 s. 116) (Act applied (prosp.) by 1955 c. 19, s. 116C(6) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2 para. 1 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix))
  • Act applied by 1996 c. 46 Sch. 2 para. 1(replacing1955 c 18 s 116) (Act applied (prosp.) by 1955 c. 18, s. 116C(6) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2 para. 1 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))
  • Act power to applied by 1996 c. 46 Sch. 2 para. 4(replacing1957 c 53 s. 63) (Act: Power to apply conferred (prosp.) by 1957 c. 53, s. 63B(4)(c) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2, para. 4 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))
  • Act power to applied by 1996 c. 46 Sch. 2 para. 1(replacing1955 c 19 s. 116) (Act: Power to apply conferred (prosp.) by 1955 c. 19, s. 116B(4)(c) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2, para. 1 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))
  • Act power to applied by 1996 c. 46 Sch. 2 para. 1(replacing1955 c 18 s 116) (Act: Power to apply conferred (prosp.) by 1955 c. 18, s. 116B(4)(c) (as substituted (prosp.) by 1996 c. 46, ss. 8, 36(2), Sch. 2 para. 1 which said amending provision was repealed (31.3.2005) by Domestic Violence, Crime and Victims Act 2004 (c. 28), ss. 58(2), 60, Sch. 11; S.I. 2005/579, art. 3(h)(i)(ix)))

Whole provisions yet to be inserted into this Act (including any effects on those provisions):

1 Application of Act: “mental disorder”.E+W

(1)The provisions of this Act shall have effect with respect to the reception, care and treatment of mentally disordered patients, the management of their property and other related matters.

(2)In this Act—

  • [F1“mental disorder” means any disorder or disability of the mind; and

  • “mentally disordered” shall be construed accordingly;]

  • F2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  • F2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

  • F2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

and other expressions shall have the meanings assigned to them in section 145 below.

[F3(2A)But a person with learning disability shall not be considered by reason of that disability to be—

(a)suffering from mental disorder for the purposes of the provisions mentioned in subsection (2B) below; or

(b)requiring treatment in hospital for mental disorder for the purposes of sections 17E and 50 to 53 below,

unless that disability is associated with abnormally aggressive or seriously irresponsible conduct on his part.

(2B)The provisions are—

(a)sections 3, 7, 17A, 20 and 20A below;

(b)sections 35 to 38, 45A, 47, 48 and 51 below; and

(c)section 72(1)(b) and (c) and (4) below.]

[F4(3)Dependence on alcohol or drugs is not considered to be a disorder or disability of the mind for the purposes of subsection (2) above.]

[F5(4)In subsection (2A) above, “learning disability” means a state of arrested or incomplete development of the mind which includes significant impairment of intelligence and social functioning.]

Textual Amendments

F1S. 1(2): definitions of "mental disorder" and "mentally disordered" substituted (3.11.2008) by Mental Health Act 2007 (c. 12), ss. 1(2), 56 (with Sch. 10); S.I. 2008/1900, art. 2(a) (with art. 3, Sch.)

Modifications etc. (not altering text)

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