"The state of emergency is prolonged by 147 unanimous votes by the parliament for four months. That is to say it will end on March 22," a ruling party deputy told Reuters.
The initial emergency was authorized on Nov. 9 and was set to last 12 days. The government wanted a six-month extension but deputies opposed it, another deputy told Reuters. Chad helped force Boko Haram to cede territory earlier this year, undermining the Islamist group's six-year campaign to carve out a Nigerian caliphate.
The rebels have since ramped up attacks in remote border areas around Lake Chad. Oil-producing Chad is a key ally in the fight against the Islamist threat across West Africa, playing a central role in offensives on al Qaeda-linked groups in Mali and Boko Haram militants in neighbouring Nigeria.
There has not been a state of emergency in Chad, one of Africa's military heavyweights, since a series of rebellions in the 2000s springing from its volatile east.
Neighbouring Niger also has a state of emergency in its border region of Diffa.
(Reporting by Madjiasra Nako; Writing by Matthew Mpoke Bigg; Editing by Sandra Maler)
