A US appeals court has ordered Secretary of State Hillary Clinton to decide within four months whether a dissident Iranian group should be removed from the US terror blacklist.
The long delays in acting on the group's petition to be removed were "egregious", the court said.
The MEK had asked the court to give Clinton just 30 days to decide.
It says its presence on the list puts members living in Iraq under threat.
The MEK, also known as the People's Mujahideen Organisation of Iran (PMOI) led a guerrilla campaign against the US-backed Shah of Iran during the 1970s and also opposed Iran's clerical leaders who replaced the Shah.