The main Western-backed Syrian opposition group said on November 11 it will attend the Geneva-2 peace talks with the Syrian government if certain conditions are met.
The Syrian National Coalition reached its decision in Istanbul following two days of meetings.
The United States and Russia are trying to convene the talks by the end of this year.
It marks the first time the group as a whole has committed to the proposed conference. But in a statement, the coalition said its representatives would attend only if the Syrian government allows the creation of humanitarian corridors to reach besieged areas and if it releases detainees, especially woman and children.
It also would require that Assad have no role in a transitional period or in the future of Syria.
The conflict in Syria has killed more than 100,000 people since it began in 2011.
Based on reporting by Reuters, dpa, and AP