Miss. Code Ann. § 45-7-21

(1) The board of supervisors of any county in the State of Mississippi having two (2) judicial districts and an assessed valuation of property for ad valorem taxation in excess of Five Hundred Million Dollars ($500,000,000.00), according to the last completed assessment for taxation is authorized to employ, in its discretion, not exceeding nine (9) persons whose duty it shall be to patrol the roads of the county and to enforce the road and motor vehicle laws.

(2) The board of supervisors of any county in the State of Mississippi wherein Interstate Highway 55 and State Highway 22 intersect and which is also traversed in whole or part by U. S. Highways 49 and 51, and State Highways 16, 17, 43 and the Natchez Trace, and also containing a part of a public lake or reservoir in excess of thirty thousand (30,000) acres, is authorized to employ, in its discretion, not exceeding seven (7) persons whose duty it shall be to patrol the roads of the county and to enforce the road and motor vehicle laws.

(3) The board of supervisors of any Class 1 county bordering on the east side of Pearl River, and wherein are located five (5) incorporated municipalities, may employ one (1) patrol officer for the supervisors district wherein are located the two (2) incorporated municipalities.