The structure of Chad Constitution is made up of :
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President Tombalbaye in 1973 included indigenous customs into the constitution. After the death of President Tombalbaye in a military coup in 1975, another amendment was made in 1978. This amendment led to the formation of a coalition government.
In June 1982, Habre came to power and dissolved the existing government. In October 1982 Habre proclaimed the Fundamental Law which described Chad a secular, indivisible republic with the ultimate power lying with the people. Arabic and French were adopted as official languages. The words of "Unity, Work, Progress" were adopted as the nation's motto in the 1982 amendment.
Further, in the 1982 amendment, the office of the president was given controlling authority of the National army, the Council of ministers, National Advisory Council.
In July 1988, Habre appointed a constitutional committee to formulate a new Constitution of Chad giving special attention to the President, Council of Ministers, National Advisory Council, Regional Government and Fundamental laws of the people.

