Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
A constitutional referendum was held in Chad on 10 December 1989. The new constitution made the country a one-party state with the National Union for Independence and Revolution as the sole legal party, as well as confirming Hissène Habré, who had come to power in a 1982 coup, as president. It also provided for a presidential republic with a unicameralNational Assembly. It was passed by 99.9% of voters, with a turnout of 93%.
Results
Choice
Votes
%
For
2,687,352
99.94
Against
1,485
0.06
Total
2,688,837
100.00
Valid votes
2,688,837
99.89
Invalid/blank votes
2,997
0.11
Total votes
2,691,834
100.00
Registered voters/turnout
2,894,825
92.99
Source: Nohlen et al.
Official results gave a total number of valid votes as 2,690,285, 1,448 more than the total of for and against votes.
Africa portal
Elections and referendums in Chad