Section 737.560 - Rating organization membership(1) Except as provided in subsection (2) of this section, nothing contained in this chapter shall be construed as requiring any insurer to become a member of or a subscriber to any rating organization.(2) Each workers' compensation insurer, including the State Accident Insurance Fund Corporation, shall be a member of a licensed workers' compensation rating organization. Amended by 1967 c.359 §334; 1969 c.690 §25; 1981 c.535 §21; 1999 c.235 §5