Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3711

Sec. 3711. (1) Except as otherwise provided in this section, a small employer carrier that offers health coverage in the small employer group market in connection with a health benefit plan shall renew or continue in force the plan at the option of the small employer.

(2) Guaranteed renewal under subsection (1) is not required in any of the following circumstances:

(3) A small employer carrier that offers health coverage in the small employer group market may modify a health benefit plan if the modification is consistent with state law and effective on a uniform basis among all small employers with coverage under the health benefit plan.