North Antrim MP Jim Allister has tabled an urgent question to the Secretary of State for Northern Ireland on the impact of a European Court of Justice ruling in the Shipova case.

The court ruled in favour of a transgender woman, determining that EU member states cannot refuse legal gender recognition to transgender citizens who have exercised free movement rights.

Allister stated that this decision contrasts with the UK Supreme Court's judgment in For Women Scotland v The Scottish Ministers, which identified biological sex as the defining factor under the Equality Act 2010.

He warned that Article 2 of the Windsor Framework requires Northern Ireland courts to follow EU jurisprudence, potentially overriding the UK Supreme Court ruling.

Allister described this scenario as a position of constitutional importance that underscores consequences of post-Brexit arrangements for Northern Ireland.

The Equality Commission for Northern Ireland has asked the High Court in Belfast to clarify application of the UK Supreme Court ruling locally.

Professor Colin Murray of Newcastle Law School stated that EU law does not permit differentiation based on biological sex as interpreted by the UK Supreme Court.

Northern Ireland applies EU equality directives under the Windsor Framework, while the Equality Act 2010 applies in Great Britain.

The UK Government has not yet responded to Allister's question.