Michigan Compiled Laws, Chapter 418. Worker's Disability Compensation § 418.357

Sec. 357. (1) When an employee who is receiving weekly payments or is entitled to weekly payments reaches or has reached or passed the age of 65, the weekly payments for each year following his or her sixty-fifth birthday shall be reduced by 5% of the weekly payment paid or payable at age 65, but not to less than 50% of the weekly benefit paid or payable at age 65, so that on his or her seventy-fifth birthday the weekly payments shall have been reduced by 50%; after which there shall not be a further reduction for the duration of the employee's life. Weekly payments shall not be reduced below the minimum weekly benefit as provided in this act.

(2) Subsection (1) shall not apply to a person 65 years of age or over otherwise eligible and receiving weekly payments who is not eligible for benefits under the social security act, 42 U.S.C. 301 to 1397e, or to a person whose payments under this act are coordinated under section 354.  1