Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.6432

Sec. 6432. (1) Every insurer transacting the kind or kinds of insurance described in subdivisions (1) and (2) of section 6406  1 (disability and loss of position insurances) shall maintain reserves for unearned premiums in accordance with the standards prescribed from time to time by the commissioner, which standards shall conform to those required of other insurers authorized to insure similar risks under the provisions of this code.

(2) Every insurer transacting the business of life insurance, endowment and/or annuity on or after January 1, 1948, shall maintain the reserves required by section 834  2 (standard valuation law); for all contracts issued between January 1, 1940, and December 31, 1947, inclusive, reserves not less than that determined by the national fraternal congress table of mortality as adopted by the national fraternal congress, August 23, 1899, with interest assumption not more than 4% per annum, or such other reserve as shall be provided by the certificate or contract of insurance, whichever may be the greater; and for all contracts issued prior to January 1, 1940, premiums shall be segregated as a separate fund or funds to be held in trust solely for the benefit of such contract, for which fund a separate accounting shall be made, unless or until the insurer shall be able to and shall elect to transfer said contracts or policies, with the reserves herein required, into 1 of the preceding 2 classes.