Gall yr Atgyfeiriad godi cwestiynau am rôl ddeddfwriaethol y deddfwrfeydd datganoledig ac am derfynau eu cymhwysedd deddfwriaethol. Gallai penderfyniad y llys felly gael effaith ar gymhwysedd deddfwriaethol y Cynulliad Cenedlaethol a’r berthynas rhwng y Cynulliad Cenedlaethol a Senedd y Deyrnas Unedig.
The Reference may raise questions about the legislative role of the devolved legislatures and the limits of their legislative competence. The court’s decision could therefore have an impact on the National Assembly’s legislative competence and the relationship between the National Assembly and the UK Parliament.