Miss. Code Ann. § 27-51-15

Motor vehicles shall be assessed uniformly according to value and such assessed value shall be determined by an assessment schedule which shall be prepared and made of minute record by the state tax commission and shall be certified to the president of the board of supervisors of the various counties of the state, and to the mayor or the presiding officer of the municipal boards of the various municipalities, and municipal separate school districts of the state, in care of the clerk of said respective boards, as the official motor vehicle assessment schedule which shall be used by the proper officials of both respective jurisdictions in assessing motor vehicle ad valorem taxes for the ensuing fiscal year.