A constitutional referendum was held in Chad

Chad

Chad , officially known as the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west...

 on 10 December 1989. The new constitution made the country a one-party state with the National Union for Independence and Revolution

National Union for Independence and Revolution

The National Union for Independence and Revolution was the ruling party in Chad between 1984 and 1990. It was founded in June 1984 by President Hissène Habré as a successor of his Armed Forces of the North, the insurgent group through which Habré had conquered power in 1982...

 as the sole legal party, as well as confirming Hissène Habré

Hissène Habré

Hissène Habré , also spelled Hissen Habré, was the leader of Chad from 1982 until he was deposed in 1990.-Early life:...

, who had come to power in a 1982 coup, as president. It also provided for a presidential republic with a unicameral

Unicameralism

In government, unicameralism is the practice of having one legislative or parliamentary chamber. Thus, a unicameral parliament or unicameral legislature is a legislature which consists of one chamber or house...

 National Assembly

National Assembly of Chad

The National Assembly is the parliament of Chad. It has 155 members, elected for a four year term in 25 single-member constituencies and 34 multi-member constituencies.-See also:*List of Presidents of the National Assembly of Chad...

. It was passed by 99.9% of voters, with a turnout was 93.04%.

Results

Choice	Votes	%
For	2,687,352	99.9
Against	1,485	0.1
Invalid/blank votes	2,997
Total	2,693,282	100
Source: Nohlen et al.