Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3851

Sec. 3851. (1) A medicare supplement policy form or certificate form shall not be delivered or issued for delivery unless the policy form or certificate form can be expected, as estimated for the entire period for which rates are computed to provide coverage, to return to policyholders and certificate holders in the form of aggregate benefits, not including anticipated refunds or credits, the following:

(2) All filings of rates and rating schedules shall demonstrate that expected claims in relation to premiums comply with the requirements of this section when combined with actual experience to date. Filings of rate revisions shall also demonstrate that the anticipated loss ratio over the entire future period for which the revised rates are computed to provide coverage can be expected to meet the appropriate loss ratio standards.