Sinn Fein assembly members will take part in the reconvened Stormont assembly in May, Gerry Adams has said.
Gerry Adams said Sinn Fein will join the reconvened assembly
After a meeting of the party executive in Dublin on Saturday the Sinn Fein president said their focus would be on forming a power-sharing government.
"The DUP have to decide if they are prepared to join the rest of us in a power-sharing government," he said.
On Thursday, the British and Irish premiers said the Northern Ireland Assembly would be recalled on 15 May.
A deadline to restore devolution by 24 November was unveiled in the "take-it-or-leave-it" plan, outlined by the prime minister and the taoiseach in Armagh.
Tony Blair and Bertie Ahern said the assembly would be recalled on 15 May with parties being given six weeks to elect an executive.
Prime ministerial summit
If that fails, the 108 members get a further 12 weeks to try to form a multi-party devolved government.
If that attempt also fails, salaries will stop.
The British and Irish governments would then work on partnership arrangements to implement the Good Friday Agreement.
The two governments' deadline for the deal will be written into an emergency law due to be brought before Parliament this month.
Northern Ireland Secretary Peter Hain told Radio Ulster's Inside Politics on Saturday this will make the deadline rock solid.
He said unionists should not be concerned about any change to NI's constitutional position if a deal on devolution cannot be achieved.
"There's no question of joint authority or anything like that," Mr Hain said.
"There's no question of joint government. That would be in contravention of the referendum that the people of Northern Ireland voted on when they endorsed the Good Friday Agreement.
"So there's no issue about that, it's not a constitutional matter."
Mr Hain also confirmed to the programme there were plans for a prime ministerial summit on Northern Ireland in June.