Halsbury’s Statutory Instruments is the standard work of authority on delegated legislation

Delegated legislation

In the United Kingdom, delegated legislation is legislation or law that is passed otherwise than in an Act of Parliament . Instead, an enabling Act confers a power to make delegated legislation on a Government Minister or another person or body...

 in England and Wales. It is one of the major legal works published by LexisNexis Butterworths

LexisNexis Butterworths

LexisNexis Butterworths is a trading name of the British publisher specialising in legal, tax and regulatory publications that was founded in 1818 by Henry Butterworth. The Butterworths publishing business is now owned and operated in the UK by Reed Elsevier Ltd, a company in the Reed Elsevier Group...

 (formerly Butterworths). Primarily used by legal practitioners and law students, it provides details of every statutory instrument

Statutory Instrument

A Statutory Instrument is the principal form in which delegated or secondary legislation is made in Great Britain.Statutory Instruments are governed by the Statutory Instruments Act 1946. They replaced Statutory Rules and Orders, made under the Rules Publication Act 1893, in 1948.Most delegated...

 of general application currently in force in England and Wales, either in full text of as an authoritative summary.

It is a companion work to both 'Halsbury's Statutes

Halsbury's Statutes

Halsbury’s Statutes of England and Wales is the authoritative source for statute law in England and Wales...

' and 'Halsbury's Laws

Halsbury's Laws

Halsbury's Laws is the name of a legal encyclopaedia produced by LexisNexis Butterworths.* Halsbury's Laws of England* Halsbury's Laws of Australia...

'