"It is a positive development for Ennahda, which has accepted the plan without reserve or conditions, and which will clear the impasse," Bouali Mbarki, the deputy head of the union, said Saturday. He said his union has a written statement from Ennahda about that, and opposition officials also confirmed the agreement.
The road map set forward by the negotiators has Prime Minister Ali Larayedh's government resigning in three weeks as negotiations go forward on the section of an apolitical figure to replace him and an interim, non-partisan government.
Meanwhile, the legislators boycotting the Assembly will return to work and finish the constitution over the next four weeks.
An election commission also will be set up to fix a date and organize presidential and legislative elections in the coming months.
With a military coup in Egypt and neighboring Libya awash in rival militias, Tunisia has been closely watched to see if its post-Arab Spring transition can succeed.
Despite attacks by terrorists, a rising extremist trend and an often acrimonious political debate, Tunisia's politics have been marked by comprise and concessions between factions.
Political analyst Salaheddine Jourchi said Ennahda's decision shows that it realized its rigid position against a caretaker government was getting it nowhere and the balance of forces in society was against it.
"This concession is the result of pressure exerted by the opposition and civil society," he said. "It allows Ennahda to take stock of itself and put its house in order because its image has been badly affected recently."
He also noted that the constitutional assembly which is dominated by Ennahda, will remain until the new elections, still giving a strong say in the transition.