Section 55 of the Act sets out the territorial extent of the Act, that is the jurisdictions within which the Act forms part of the law.
	Subsection (1) provides that an amendment or repeal made by the Act has the same extent as the provision which it amends or repeals. The majority of the Mental Health Act 1983, which the Mental Health Act 2025 amends, extends to England and Wales.
	Subsection (2) provides that sections 51, 53 and 55-57 of the Act extend UK wide.
General Section 55: Extent