Miss. Code Ann. § 33-1-3

The board of supervisors of any county or the governing authorities of any municipality, either or both, may aid one or more federally recognized units of the Mississippi National Guard, or one or more units of the Mississippi State Guard, by appropriating annually a sum of money to be paid to the commander of each such unit, who shall account for and expend same under and in accordance with such regulations as the Adjutant General shall make. The board of supervisors of any county, the governing authorities of any municipality or the trustees of any school district, or any one or more of them, are further empowered to make such appropriations as they see fit for constructing, reconstructing, repairing, rehabilitating and improving military installations and property for the use of the Mississippi National Guard and Mississippi State Guard.

In all cases where the board of supervisors of counties, the governing authorities of municipalities or the trustees of school districts have, prior to the passage of this chapter, executed leases or conveyances of land for purposes authorized by this title, such leases and conveyances are hereby ratified, confirmed and validated.