Miss. Code Ann. § 65-1-147

Any link or part of the legislatively designated state highway system on July 1, 1981 that is removed from that system by appropriate statute shall revert for all purposes to the jurisdiction of the county and political subdivision in which it lies, and the link so removed may, in the discretion of the board of supervisors of the county in which it lies, be and become a part of the state aid roads system and be governed by the statutes regulating that system.