The UK Statute Law Database (SLD) is the official revised edition of the primary legislation of the United Kingdom made available online and was released to the public on 20 December 2006.
SLD is published 'by Authority', which means that it is published with the authority of the Crown.
The originating text of SLD is derived mainly from the publication Statutes in Force (SIF), a 'loose-leaf' style official edition of the revised statute book arranged according to subject matter. SIF was regularly updated with the effects of new legislation made until 1 February 1991. The date of this final revision became the 'basedate' from which SLD has been taken forward. The SIF text in turn derived from a series of earlier official revised editions, principally The Statutes Revised. The main source of the original text of these editions was The Statutes of the Realm, published between 1810 and 1828, which contained the full text of public Acts of Parliament enacted up to 1713.
New legislation made since the basedate has been added, including that of the devolved legislatures in Scotland, Wales and Northern Ireland. From the basedate onwards, both primary and secondary legislation are held on SLD, though it remains the case at present that only primary legislation is revised.
The other main source of legislation held on SLD is The Northern Ireland Statutes Revised, the official revised version of the primary legislation of Northern Ireland. The content of this has been incorporated into SLD as it stood at 31 December 2005. The revision work on the Northern Ireland statutes will now be carried forward on SLD with a separate Northern Ireland basedate of 1 January 2006.