Parliamentary Constituencies Act 1986
Encyclopedia
The Parliamentary Constituencies Act 1986 (c. 56) is an Act
Act of Parliament
An Act of Parliament is a statute enacted as primary legislation by a national or sub-national parliament. In the Republic of Ireland the term Act of the Oireachtas is used, and in the United States the term Act of Congress is used.In Commonwealth countries, the term is used both in a narrow...

 of the Parliament of the United Kingdom
Parliament of the United Kingdom
The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories, located in London...

. It is the legislation defining the constitution and work of the 4 parliamentary Boundary Commissions in the UK. A copy of the current text of the legislation, incorporating all current amendments, is available from the legislation section of the Boundary Commission for Scotland website.
The 1986 Act consolidated earlier legislation, namely the House of Commons (Redistribution of Seats) Act 1949
House of Commons (Redistribution of Seats) Act 1949
The House of Commons Act 1949 was an Act of the Parliament of the United Kingdom that provided for the periodic review of the number and boundaries of parliamentary constituencies....

, and the Acts of the same name of 1958 and 1979.

Amendment

The 1986 Act has been amended by the Boundary Commissions Act 1992, and by various other statutes, and remains in force. In February 2011, the Parliamentary Voting System and Constituencies Act 2011 received Royal Assent. It contains substantial amendments to the 1986 Act. The changes lead to the Sixth Periodic Review of Westminster constituencies
Sixth Periodic Review of Westminster constituencies
The Sixth Periodic Review of Westminster constituencies, also known as the 2013 Review, is an ongoing process by which parliamentary constituencies to the British House of Commons will be reformed, to comply with the revised rules for the number and size of constituencies introduced by the...

which will see 50 fewer constituencies, less variation in electorate between constituencies, more frequent boundary reviews and a shortened review process.
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