Mich. Comp. Laws § 500.6412

Sec. 6412. No insurer subject to subdivision (3) of section 6406 (transaction of life insurance) shall write in Michigan any contract of annuity, or retain by virtue of supplemental agreement any proceeds of any policy or contract of insurance upon deposit with such insurer at interest or upon settlement option, until it shall have a contingency reserve deposit as defined and described in section 6434, in the amount of $100,000.00, and shall have obtained from the commissioner a certificate of authority to write such contracts of annuity or supplemental agreements.