Mo. Rev. Stat. § 285.740
2.
(2) Workers' compensation coverage for covered employees in the voluntary market may be obtained by either:
(b) The PEO through duly authorized self-insurance under section 287.280, through the type of policy referenced under the provisions of 20 CSR 500-6.800(5)(c)2 issued to the PEO by a carrier authorized to do business in this state, or through a multiple coordinated workers' compensation policy issued by a carrier authorized to do business in this state in the name of the PEO or the client.
A PEO authorized to self-insure under section 287.280 shall report to the insurer or the appropriate state and rating authorities such client-based information as is necessary to maintain the client's experience rating.
3. A PEO that applies for coverage or is covered through the voluntary market shall also maintain and furnish to the insurer sufficient information to permit the calculation of an experience modification factor for each client upon termination of the coemployment relationship. Information reported during the term of the coemployment relationship which is used to calculate an experience modification factor for a client prior to and upon termination of the professional employer agreement shall continue to be used in the future experience ratings of the PEO. Such information shall include:
10.
(L. 2018 H.B. 1719)