The Board of Commissioners, any officer or the Executive Director of the Mississippi Bar shall not be authorized to lease any office space for the use of the Mississippi Bar if such space is being leased for an annual amount in excess of the annual amount paid by the State Supreme Court for its office space. The lease of any office space by the Board of Commissioners, an officer or the Executive Director of the Mississippi Bar for the use of the Mississippi Bar must be approved by the Department of Finance and Administration. The bylaws of the bar shall not be in conflict with the provisions of this section. The provisions of this section shall not apply to any lease existing as of July 1, 1991.