Mississippi Constitution Art. 8, § 211

(1) The Legislature shall enact such laws as may be necessary to ascertain the true condition of the title to the sixteenth section lands in this State, or lands granted in lieu thereof, in the Choctaw Purchase, and shall provide that the sixteenth section lands reserved for the support of township schools, except as hereinafter provided, shall not be sold nor shall they be leased for a longer term than ten (10) years for lands situated outside municipalities and for lands situated within municipalities for a longer term than ninety-nine (99) years, for a gross sum; provided further, that existing leases of the sixteenth section lands situated in the municipalities of the State may, for a gross sum, be extended for a term of years not exceeding ninety-nine (99) years from the date of such extension, but the Legislature may provide for the lease of sixteenth section lands for a term of years not exceeding twenty-five (25) years for forest and agricultural lands and not exceeding forty (40) years for all other classifications of such lands for a ground rental, payable annually, and in the case of uncleared lands may lease them for such short terms as may be deemed proper in consideration of the improvement thereof, with right thereafter to lease for a term or to hold on payment of ground rent; provided however, that land granted in lieu of sixteenth section lands in this state and situated outside of the county holding or owning same may be sold and the proceeds from such sale may be invested in a manner to be prescribed by the Legislature; but provided further, however, that the Legislature, for industrial development thereon, may authorize the sale, in whole or in part for a gross sum or otherwise, of sixteenth section lands, or lands granted in lieu thereof situated within the county; and the Legislature shall either provide for the purchase of other lands within the county to be held for the benefit of the township schools in lieu of the lands sold or shall provide for the investment of the proceeds of such sale for the benefit of the township schools, or the Legislature may provide for both purchase of other lands to be so held and investment of proceeds for the benefit of the township schools; and the Legislature, for industrial development thereon, may authorize the granting of leases on sixteenth section lands, or lands granted in lieu thereof, in whole or in part, for a gross sum or otherwise, for terms not to exceed ninety-nine (99) years, and the Legislature shall provide for the investment of the proceeds of such leases for the benefit of the township schools. The Legislature may authorize the lease of not more than three (3) acres of sixteenth section lands or lands granted in lieu thereof for a term not exceeding ninety-nine (99) years for a ground rental, payable annually, to any church, having its principal place of worship situated on such lands, which has been in continuous operation at that location for not less than twenty-five (25) years at the time of the lease.

(2) Notwithstanding any limitation on the terms of leases provided in subsection (l) of this section, the Legislature may provide, by general law, for leases on liquid, solid or gaseous minerals with terms coextensive with the operations to produce such minerals.