Notwithstanding any provision of Chapter 61, Title 57, Mississippi Code of 1972, to the contrary, the Mississippi Major Economic Impact Authority shall certify to the Department of Economic and Community Development the amount of money necessary for the Major Economic Impact Authority to purchase land in fee simple to provide a buffer zone for the National Aeronautics and Space Administration facility to be constructed in Tishomingo County, which amount shall not be more than Seven Million Dollars ($7,000,000.00); and the department shall, if funds have not otherwise been made available, provide a grant to the authority for such amount out of the proceeds of bonds issued under the Mississippi Business Investment Act. Any funds remaining unexpended after the purchase of land hereunder shall be deposited in the Mississippi Business Investment Sinking Fund. No funds in excess of the amount authorized in this section shall be expended pursuant to the Mississippi Business Investment Act for or in connection with the National Aeronautics and Space Administration facility to be constructed in Tishomingo County.