Libyan Prime Minister Abdulhamid al-Dbeibah intends to run for president, a senior official in the Government of National Unity (GNU) said on Sunday, as official registration for candidates opens on Monday.

Libya’s High National Elections Commission said on Sunday it would open registration on Monday for candidates in presidential and parliamentary elections that have been mandated by a UN-backed roadmap on December 24.

Wrangling over the legal basis for the election, as well as its date and qualifications for candidates, has threatened to derail a peace process that was seen as Libya’s best hope in years of ending chronic instability and violence.

Potential candidates include Khalifa Haftar, the commander of eastern-based forces in the civil war; Saif al-Islam Gaddafi, the son of the former dictator; the parliament head Aguila Saleh; and a former interior minister, Fathi Bashagha.

The UN peace process also led to the installation of an interim unity government and installed Abdulhamid al-Dbeibah as prime minister.

An election law proposed by the parliament in September was rejected by the bodies’ critics, including other political entities, for breaching some conditions set by the UN roadmap.

The law set a first round of the presidential election in December but said the date for parliamentary elections would not be set until January.