Section 136(4) in The Mizoram Autonomous District Council (Constitution and Conduct of Business of the District Councils) Rules, 1974
(4)On completion of the scrutiny of nominations, the Returning Officer shall forthwith examine the symbols selected by the candidates, and if such symbols are found to conflict with each other or with any symbols already assigned, he shall allocate the symbols in conformity, as far as possible, with the wishes of the candidates and if necessary by lot and his decision in this respect shall be final. Each candidate or his election agent shall at the same time be informed of the symbol assigned to him and shall be given a specimen thereof. The Returning Officer shall then prepare a list of valid nominations indicating therein the symbols assigned to each candidate and shall cause such list to be affixed in some conspicuous place in his office.