Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3402

(a) The entire money and other considerations for the policy are expressed in the policy.

(b) The time at which the insurance takes effect and terminates is expressed in the policy.

(c) The policy purports to insure only 1 individual, except that a policy may insure, originally or by subsequent amendment, upon the application of an adult member of a family who is considered to be the policyholder, any 2 or more eligible members of that family, including husband, wife, dependent children, any children under a specified age, and any other individual dependent upon the policyholder, if coverage is made available to any dependent child at least until the child turns 26 years of age for a health insurance policy or 19 years of age for a policy of disability insurance, a policy providing pediatric dental benefits, or a policy providing pediatric vision benefits.