The Act of Classes was passed by the Parliament of Scotland on 23 January 1649. It was probably drafted by Lord Warriston, a leading member of the Kirk Party, who along with the Marquess of Argyll were leading proponents of its clauses.[1][2] It banned Royalists and those who had supported the Engagement from holding public office including positions in the army. Against sizeable opposition the rescinding of the Act took effect on 13 August 1650.[3]