Ali Tarhuni, a liberal politician and former rebel minister, was elected to head Libya's constituent assembly, a spokesman for the body charged with drawing up a new constitution said Tuesday.
Tarhuni, an exiled opponent of dictator Moamer Kadhafi, returned to Libya to take part in the 2011 revolt which toppled his regime.
He held a ministerial post in a transitional government set up by the rebels, and went on to found the National Centrist Party, part of the liberal National Forces Alliance.
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Libya's constituent assembly launched its work Monday in Al-Baida, in the country's east.
But 13 of the 60 assembly seats remain vacant, after unrest in certain areas stopped voting in a February 20 election to choose the body.
A date for a new poll has yet to be set.
The body, which has 18 months to prepare a draft constitution, is based in the eastern town, as it was for a 1951 charter which Kadhafi abolished in 1977.