Miss. Code § 27-51-21
On or before the first day of July each year, the tax commission shall forward to the president of the board of supervisors of each county and to the mayor or other presiding officer of the governing board of each municipality, in care of the clerk of the respective boards, a certified copy of the assessment schedule which is designed to become effective for the then ensuing fiscal year in assessing and collecting ad valorem taxes on motor vehicles as defined in this chapter.
At the July meeting of the board of supervisors of the county and the governing board of the municipality, the boards shall examine and consider the motor vehicle assessment schedule and shall adopt an order on their respective minutes that such motor vehicle assessment schedule is ready and open for inspection and examination by any interested taxpayer and that within a period of fifteen (15) days the respective boards shall reconvene in regular or adjourned meeting to hear and take action on any complaint, filed in writing, objecting to and petitioning for a specified reduction on any portion or portions of the assessment schedule affecting the complainant directly. The respective boards shall continue in session from day to day until all such objections and petitions have been heard and action has been taken thereon. The order provided for herein shall refer by name to this chapter, and it shall not be necessary to incorporate in the order the provisions of this chapter.
Miss. Code § 27-51-21