Each member of the board, including the chairman thereof, shall, before entering upon the duties of his office, execute such bond as may be required by the Governor for the protection of the state and those having business before the board. The expense of such bond is to be paid by the state, such bond to be conditioned upon the faithful discharge of the duties of such member of the board and his faithful accounting for all moneys coming within his custody or control, whether such funds shall be the property of the State of Georgia or of any other person, firm, or corporation.