If a public official or public employee, or family member of the public employee or family member of the public official, or a business with which the person is associated, represents a client or constituent for a fee before any quasi-judicial board or commission, regulatory body, or executive department or agency, notice of the representation shall be given within 10 days after the first day of the appearance. Notice shall be filed with the commission in the manner prescribed by it. No member of the Legislature shall for a fee, reward, or other compensation represent any person, firm, or corporation before the Public Service Commission or the State Board of Adjustment.