Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.801k

(a) A vehicle registered under section 801(1)(j) or (k)  1 or section 801g  2 whose registration expires on or after March 1, 2020 and whose registration is renewed before March 31, 2021.A vehicle registered under section 801(1)(j) or (k) or 801g whose registration expires after March 31, 2021 but before August 1, 2021 and whose registration is renewed within 120 days after the date of the expiration. The secretary of state shall, upon an applicant's request, reimburse a late renewal fee assessed and collected for a vehicle registered under section 801(1)(j) or (k) or 801g whose registration expires after March 31, 2021 but before August 1, 2021 and whose registration is renewed within 120 days after the date of the expiration.

(b) All other vehicles registered under this chapter whose registration expires on or after March 1, 2020 and whose registration is renewed before March 31, 2021.All other vehicles registered under this chapter whose registration expires after March 31, 2021 but before August 1, 2021 and whose registration is renewed within 120 days after the date of the expiration. The secretary of state shall, upon an applicant's request, reimburse a late renewal fee assessed and collected for all other vehicles registered under this chapter whose registration expires after March 31, 2021 but before August 1, 2021 and whose registration is renewed within 120 days after the date of the expiration.

(a) The secretary of state shall not assess a late renewal fee for a registration under section 216(2), 226(11) or (13), or 255(4)  3 if the registration expires after March 31, 2021 but before August 1, 2021 and is renewed within 120 days after the date of the expiration.

(b) The secretary of state shall, upon an applicant's request, reimburse a late renewal fee assessed and collected for a registration under section 216(2), 226(11) or (13), or 255(4) if the registration expires after March 31, 2021 but before August 1, 2021 and is renewed within 120 days after the date of the expiration.