Mich. Comp. Laws § 421.32c

Sec. 32c. (1) Notwithstanding any other provision of this act, for a claim filed after March 15, 2020, but before the effective date of the amendatory act that added this section, the unemployment agency shall not reconsider the claim based solely on whether an applicable executive order issued by the governor that was in effect at the time the claim was initially examined did or did not have the force of law. (2) A new, additional, or continued claim for unemployment benefits filed within 28 days after the last day the claimant worked is considered to have been filed on time under this act and the rules promulgated under this act. This subsection does not apply after March 31, 2021.