(1) An investment fiduciary may invest in annuity investment contracts or participations in separate real estate, mortgage, bond, stock, or other special investment accounts of a life insurance company authorized to do business in this state. An investment in such a separate account shall be considered an investment in stock under section 14 only to the extent that the separate account's assets include stock, and then only for the purpose of determining the 70% maximum investment limit under section 14. An investment in such a separate account shall also be considered an investment in real or personal property under section 19(1), but only to the extent that the separate account's assets include real or personal property, and then only for the purpose of determining the 5% maximum investment limit under section 19(1).

    (2) An investment fiduciary may invest in the general account of a life insurer authorized to do business in this state under the insurance code of 1956, 1956 PA 218, MCL 500.100 to 500.8302, but the total amount of assets of any 1 system invested in any 1 insurer shall not exceed 50% of the capital and surplus of the insurer.

    (3) A life insurance company under this section shall have been in operation for at least 5 years and have assets under management of more than $500,000,000.00. The insurance company shall have a claims-paying ability rating no less than single A according to A.M. Best & company or AA- according to Duff & Phelps credit rating corp., and an overall company financial strength rating no less than Aa3 according to Moody's investors service, inc. or AA- according to Standard & Poor's ratings group.