1999 Tajik constitutional referendum|
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| Choice | Votes | % |  
| Yes | 1,860,804 | 75.32% |  
| No | 609,787 | 24.68% |  
| Valid votes | 2,470,591 | 95.32% |  
| Invalid or blank votes | 121,314 | 4.68% |  
| Total votes | 2,591,905 | 100.00% |  
| Registered voters/turnout | 2,800,947 | 92.54% |  | 
A constitutional referendum was held in Tajikistan on 26 September 1999. The changes included legalising religious political parties, introducing a bicameral parliament, and lengthening the president's term from five to seven years. They were approved by 75% of voters, with a turnout of 93%.