Updated

Iraq's federal court says Prime Minister Haider al-Abadi's proposal to abolish the largely ceremonial posts of vice president and deputy prime minister is unconstitutional.

The court's decision on Monday states that under Iraq's constitution abolishing the posts would require the approval of an absolute majority in parliament followed by a referendum presented to the Iraqi people.

Al-Abadi canceled the posts last year as part of a wide-ranging reform plan that was approved by his Cabinet and passed by Parliament. It was intended to shore up public support for his government in the face of widespread protests.

The federal court's decision underscores the enduring weakness of the Iraqi government as the country prepares to retake the city of Mosul from the Islamic State group.