The boards or councils whose officers or members are subject to section 73-a of the Public Officers Law and are not subject to section 73 of such law by virtue of their uncompensated or per diem compensation status and the commissions, public authorities, and public benefit corporations whose member or directors are subject to section 73-a of the Public Officers Law and are not subject to section 73 by virtue of their uncompensated or per diem compensation status shall adopt a code of ethical conduct covering conflicts of interest and business and professional activities, including outside activities, of such directors, members, or officers both during and after service with such boards, councils, commissions, public authorities, and public benefit corporations. Such codes of ethical conduct shall be filed with the commission.