Stephen Tierney: The Lord Advocate’s Reference: Referendums and Constitutional Convention – UK Constitutional Law Association
‘Section 29(1) of the 1998 Act provides that an Act of the Scottish Parliament is not law so far as any provision of the Act is outside the legislative competence of the Parliament. A provision is outside that competence so far as it “relates to reserved matters” (s.29(2)(b)), and whether or not it relates to a reserved matter is to be determined by “reference to the purpose of the provision, having regard (among other things) to its effect in all the circumstances” (s.29(3)).’
UK Constitutional Law Association, 4th October 2022
Source: ukconstitutionallaw.org