Miss. Code § 23-15-1055
The state executive committee of each political party shall determine the method and procedures by which delegates and delegate alternates to the national nominating conventions are to be selected as well as adopt any other rule not inconsistent with this chapter. The state executive committee of the political party shall establish, at least ninety (90) days prior to the second Tuesday in March in years in which a presidential election is held, procedures to be followed in the nomination of candidates for delegates and delegate alternates to the nominating convention of the political party. A copy of any rule or regulation adopted by the state executive committee shall be sent to the Secretary of State within seven (7) days after its adoption to become a public record.
Miss. Code § 23-15-1055