Parliament speaker Aguila Saleh and President of the High Council of State Khaled Al-Mishri met at the UN in Geneva for three days of talks to discuss the draft constitutional framework for elections.
But while some progress was made, not enough was achieved to move toward national polls Both sides still disagree as to who can be a a presidential candidate, according to UN's top Libya envoy Stephanie Williams, who facilitated the talks.
A week of talks earlier this month in Cairo between the Tripoli-based High Council and Saleh's eastern-based House of Representatives (HoR), aimed at setting up that vote, without a breakthrough.
They included the designation of the headquarters and distribution of seats for both chambers, and the division of responsibilities between the president, prime minister, cabinet and local government.
They have also reached consensus on decentralization, including the number of governorates and their powers; revenue allocation mechanisms for the different levels of government; and increased representation for cultural components, said Williams.
"Disagreement persists on the eligibility requirements for the candidates in the first presidential elections," she said in a statement.
Libya has been split between a Government of National Accord (GNA) in Tripoli, and the eastern-based HoR, backed by military leader Khalifa Haftar.
According to Libyan media, the spat over presidential candidate eligibility relates to whether dual nationals can run. Haftar holds U.S. nationality.