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Types of Legislation on SLD

SLD is the official revised edition of the statute book for the UK in electronic form. When we use the term “statute book” in the context of SLD, we mean, broadly speaking, primary legislation of a public general nature.


Most types of primary legislation made in the UK are held on SLD in revised form. Other primary legislation and secondary legislation from 1991 onwards is held on SLD only in unrevised (‘as enacted’) form.


For pre-1991 legislation held and revised on SLD, the earliest version is the revised text as it stood at 1 February 1991 (the basedate). Legislation wholly repealed before the basedate is not carried.


SLD has now incorporated the revised primary legislation of Northern Ireland previously published in The Northern Ireland Statutes Revised and its supplements. As the historical versioning of the Northern Ireland statutes will date only from 1 January 2006 (the Northern Ireland basedate), the unrevised (“as enacted”) versions of these statutes enacted from 1991 to the end of 2005 will continue to be retained on SLD.



We are still in the process of loading the unrevised legislation mentioned above onto the new SLD system. For information about the progress of this exercise, see New Legislation.


Details of the legislation held on SLD are as follows:




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