Section 35 of the Scotland Act 1998 and Executive Control of Devolved Legislation

This article examines the first use of section 35 of the Scotland Act 1998, which prevented the Gender Recognition Reform (Scotland) Bill from receiving Royal Assent. It argues that the 2023 Order is constitutionally significant because it operationalised a previously unused form of executive control over devolved legislation. Section 35 permits intervention where the Secretary of State has reasonable grounds to believe that modifications made by a devolved Bill would adversely affect the operation of reserved law. It therefore separates legislative competence from legislative effectiveness: a Bill may fall within devolved competence yet be prevented from becoming law following a prospective ministerial assessment. Drawing on the statutory framework, the Statement of Reasons, and the Court of Session's judgment, the article characterises section 35 as a preventive executive power constrained by statutory conditions, parliamentary annulment, and judicial review, but one which affords substantial latitude to predictive ministerial judgement. It develops this arrangement as a statutory form of conditional autonomy, building on earlier accounts of politically conditioned devolution, and situates the provision within a broader pattern of UK executive constitutionalism. Its longer‐term significance will depend on whether section 35 remains exceptional or becomes a more regular instrument of territorial governance.