A commission is hereby established to be known as the lieu land commission, hereinafter referred to as the commission, and such commission shall consist of the attorney general, who shall be ex officio chairman, the secretary of state and the state land commissioner, who shall be ex officio secretary. Said lieu land commission shall have authority to sell all lands granted in lieu of sixteenth section land and located out of the county owning such land situated in the State of Mississippi. From and after July 1, 1981, said lieu land commission shall proceed to sell all such lands granted in lieu of sixteenth section land and located out of the county owning such land situated in the State of Mississippi.