McGuinness quits Westminster seat
Deputy First Minister Martin McGuinness is to resign as MP for Mid Ulster to concentrate on his job at Stormont.
Sinn Fein's four other MPs are to resign from their assembly seats as the party seeks to end "double-jobbing".
Party president Gerry Adams said this would avoid triggering a string of Westminster by-elections.
It is likely that any by-election in Mid Ulster will not take place until the autumn.
The four MPs resigning their Stormont seats will be replaced by co-option.
Sinn Fein party president Gerry Adams said they wanted to avoid having by-elections.
However, he left the door open for the possibility of the MLAs returning to Stormont at the next Northern Ireland Assembly elections.
In February, Executive Minister Alex Attwood unveiled plans to outlaw "double-jobbing" within two years.