Welsh statutory instrument

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A Welsh statutory instrument (WSI; Welsh: is-offerynnau Cymreig) is subordinate legislation made by the Welsh Ministers, as well as subordinate legislation made by public bodies using powers provided to be exercisable by Welsh statutory instrument. WSIs are the main form of subordinate legislation in Wales, being used by default to exercise powers delegated to the Welsh Ministers, the Counsel General, and the King-in-Council.^[1]

The Legislation (Wales) Act 2019 defines what a Welsh statutory instrument is.^[1] Until this Act, WSIs were governed by the Statutory Instruments Act 1946, which continues to govern UK statutory instruments.^{[2][3][4][5][6][1]}

Before Welsh devolution, subordinate legislation applying only to Wales was published as a subseries of the larger UK statutory instrument (SI) series. This subseries is now used for SIs which deal with reserved matters in relation to Wales.^[7]