Miss. Code Ann. § 41-11-7

In all counties and municipalities whose residents use the facilities of the University of Mississippi Medical Center, the board of supervisors is hereby authorized and empowered, in its discretion, to make an unlimited annual appropriation to the Medical Center, and the governing authorities of the municipality are hereby authorized and empowered, in their discretion, to make an unlimited annual appropriation to the Medical Center. The funds thus appropriated by the county and by the municipality for the added maintenance and support of the Medical Center shall be paid from the General Fund of the county and the municipality, and the amount thus appropriated by the county and by the municipality may be paid in monthly installments for the use and benefit of the Medical Center.