Parliamentary Oaths Act 1866

2The Name of the Sovereign for the Time being to be used in the Oath,

Where in the Oath hereby appointed the Name of Her present Majesty is expressed, the Name of the Sovereign of this Kingdom for the Time being by virtue of the Act " for the further Limitation " of the Grown, and better securing the Eights and Liberties of the " Subject," shall be substituted from Time to Time with proper Words of Reference thereto.