Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3412

Sec. 3412.(1) Except as otherwise provided in subsection (2), an insurer shall include in a disability insurance policy, other than a health insurance policy, a provision as follows:

NOTICE OF CLAIM: Written notice of claim must be given to the insurer within 20 days after the occurrence or commencement of a loss covered by the policy, or as soon after the loss as is reasonably possible. Notice given by or on behalf of the insured or the beneficiary to the insurer at ․․․․․․․․․․․․․․․․․․․․․ (insert the location of the office the insurer designates for this purpose), or to any authorized agent of the insurer, with information sufficient to identify the insured, is considered notice to the insurer.

(2) For a policy that provides a loss-of-time benefit payable for at least 2 years, an insurer may at its option insert the following between the first and second sentences of the provision required under subsection (1):

Subject to the qualifications set forth below, if the insured suffers loss of time on account of disability for which indemnity is payable for at least 2 years, the insured will, at least once in every 6 months after having given notice of claim, give to the insurer notice of continuance of the disability, unless the insured is legally incapacitated. The period of 6 months following any filing of proof by the insured or any payment by the insurer on account of the claim or any denial of liability in whole or in part by the insurer is excluded in applying this provision. Delay in giving the notice required under this provision does not impair the insured's right to any indemnity that would otherwise have accrued during the 6 months preceding the date on which the notice is actually given.