Section 125(1) in The Mizoram Autonomous District Council (Constitution and Conduct of Business of the District Councils) Rules, 1974
(1)As soon as may be after the commencement of the Mizoram District Councils (Miscellaneous Provisions) Order, 1972, a general election shall be held under these rules for the constitution of a new District Council for each Autonomous District and thereafter a general election shall be held on the expiration of the duration of the then existing District Council or on its dissolution.