When submitting a renewal of any firm or sole proprietorship license, the principal broker or supervising broker of the firm shall certify that he has audited or has caused to be audited the operations, policies, and procedures of the firm to assure compliance with the provisions of this chapter and with regulations adopted by the Board. Such audit shall be conducted at least once during each term of licensure, and the completed audit form developed by the Board, signed by the principal or supervising broker, shall be kept on the premises of the firm or sole proprietorship and shall be produced for inspection or copying upon request by an authorized agent of the Board.