Chancellor must ratify Gerry Adams move
Chancellor George Osborne will have to sign off Sinn Fein leader Gerry Adams' resignation as the MP for West Belfast.
Parliamentary protocol means every Member of Parliament remains in the post until death, expulsion or disqualification, under rules dating back to 1624.
Mr Adams will have to apply to the Treasury to be appointed Crown Steward and Bailiff of the Chiltern Hundreds, one of two offices for profit that allow him to be formally disqualified.
He announced last week he will resign from Westminster as he is standing for election to the Dail.
Normally the party of the MP quitting will move the writ to spark a by-election, but as Sinn Fein do not take their seats the Government will take on the role.