Section 55 of the Act sets out its territorial extent, which describes the jurisdictions in which the Act will form part of the law.
	The Act extends and applies to England and Wales only, aside from General sections 53 to 57, which extend UK-wide. Several sections 4, 21, 41 and schedule 3, apply to England only where the Welsh Government has their own respective provisions, or in the case of section 4, because it implements the policy of NHS England, an England-only body.
	The Act amends the 1983 Act, which applies to England and Wales. The proposed reforms concern both health, which is primarily a devolved matter in Wales, and also mentally disordered patients in the criminal justice system, which is reserved for England and Wales. Some provisions in the Act are considered to modify functions of Devolved Welsh Authorities. To the extent that the provisions of the Act fall within the legislative competence of devolved legislatures, the legislative consent process is engaged.
	There is a convention that Westminster will not normally legislate with regard to matters that are within the legislative competence of the Scottish Parliament, Senedd Cymru or the Northern Ireland Assembly without the consent of the legislature concerned. It is the view of the UK Government that aspects of the Act relating to health, rather than criminal justice, fall within the legislative competence of the Senedd Cymru.
Territorial extent and application