In Wales, an Act of Senedd Cymru is primary legislation that can be made by Senedd Cymru under part 4 of the Government of Wales Act 2006. Prior to 6 May 2020 any legislation was formally known as Act of the National Assembly for Wales. 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. The activation of part 4 legislative powers was as a result of a "yes" vote in the 2011 referendum held in Wales. 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 Existing Measures will remain as law unless repealed.
Bills may be introduced by Welsh Government, a committee of the Senedd, the Senedd Commission or by individual Members of the Senedd. Ballots are held to select which individual Senedd members may present bills. Once a bill is introduced, there are four stages that need to be completed prior to the bill being submitted for royal assent. The first stage involves consideration of the general principles of the bill by a committee of the Senedd and then agreement of these principles by the Senedd in plenary session. In the second stage, the bill is considered in detail by a bill committee. The third stage involves detailed consideration of the bill and any amendments by the Senedd in plenary, this can be followed by a Report Stage where further amendments can be proposed. Finally, in the fourth stage, the Senedd votes to pass the bill in its final form.
When a bill completes its passage through the Senedd, it enters a four-week period of intimation, during which the Attorney General for England and Wales or the Counsel General for Wales may refer the bill to the Supreme Court of the United Kingdom if they consider that any provisions of the bill are outside the legislative competency of the Senedd. The Secretary of State for Wales may also make an order prohibiting the Clerk to the Senedd from submitting the Bill for royal assent during this time. After the period of intimation expires, the Clerk may submit the bill for royal assent. The bill becomes an Act of the Senedd when Letters Patent under the Welsh Seal are made by the Queen to signify assent.
Royal assent to Acts of the Assembly was given by means of Letters Patent using the following wording: The Letters Patent may also be made in Welsh:
Enacting formula
Acts of the Assembly begin with the following words of enactment: English Language: "Having been passed by Senedd Cymru and having received the assent of Her Majesty, it is enacted as follows:-" Welsh Language: "Gan ei fod wedi ei basio gan Senedd Cymru ac wedi derbyn cydsyniad Ei Mawrhydi, deddfir fel a ganlyn:-"
Subjects in which Acts can be made
Under part 4 of the Government of Wales Act 2006, the Senedd has legislative competence in the following 20 "Subjects" outlined on schedule 7 of that act:
