Miss. Code § 23-15-235
In addition to the poll managers appointed pursuant to Section 23-15-231, for the first five hundred (500) registered voters in each voting precinct, the election commissioners may, in their discretion, appoint not more than three (3) persons to serve as poll managers of the election. The election commissioners may, in their discretion, appoint additional persons to serve as poll managers for each one thousand (1,000) registered voters or fraction thereof in each voting precinct above the first five hundred (500), as determined necessary by the election commissioners and approved by the board of supervisors. Any person appointed as poll manager shall be a qualified elector of the county in which the voting precinct is located.
Miss. Code § 23-15-235