Act of Senedd Cymru

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An Act of Senedd Cymru (Welsh: Deddf gan Senedd Cymru), or informally an Act of the Senedd, is primary legislation that can be made by the Senedd (Welsh Parliament; Welsh: Senedd Cymru) under part 4 of the Government of Wales Act 2006 (as amended by the Wales Act 2017).^[3] Prior to 6 May 2020 any legislation was formally known as an Act of the National Assembly for Wales (Welsh: Deddf Cynulliad Cenedlaethol Cymru) or informally, an Act of the Assembly.

The power to make primary legislation was conferred on the assembly following the 2011 elections as a commencement order had been passed in the Assembly by simple majority prior to dissolution.^[4] The activation of part 4 legislative powers was as a result of a "yes" vote in the 2011 referendum held in Wales.^[5] When the power to make Acts of the Assembly commenced, the Assembly lost the ability to make Measures under part 3 of the 2006 Act. Existing Measures will remain as law unless repealed.^[3]

The current name was adopted when the Senedd and Elections (Wales) Act took effect on 6 May 2020, which renamed the "Acts of the National Assembly for Wales" stated in section 107(1) of the Government of Wales Act 2006 as officially "Acts of Senedd Cymru" (plural Welsh: Deddfau Senedd Cymru) and informally referred to as “Acts of the Senedd”.