The board of supervisors of any such county described in Section 59-7-201 may prescribe such further duties, powers and rights of such commission as may be within the authority of such board to delegate and provide for the reasonable compensation, if any, of the chairman and members of the commission, and shall provide that the acts of such commissioners shall regularly, and not less than quarterly or more than monthly, be reported to said board and be subject to its approval and concurrence by order spread upon the minutes of said board generally approving such reports and minutes. The obligations incurred and the expenditures authorized to be made by said commission shall in the manner herein set forth be subject to the approval of the board of supervisors of said county; and when and should the board decline to grant its approval of any act of said commission, it shall signify its reason for withholding that approval on the minutes of said board. All expenditures so authorized and provided for shall be made upon special port commission warrants to be countersigned by the clerk of said board. There shall be no personal obligation or liability on the part of any member of said commission except for a wilful wrong, nor shall there be any general obligation or liability on said county other than from the revenues derived from the operation of said port and revenues allocated by law to the aforesaid port fund of said county, except for the obligation of a condemnation award or for any such obligation which may be provided for in any trust indenture or resolution under which bonds are issued under the terms and provisions of Article 3 of this chapter.