Mich. Comp. Laws § 38.1169

Sec. 9. A retired state employee who is the recipient of recognition under this act will be treated as a self-employed person for tax purposes and shall receive recognition from the appropriated fund for the recognition system as administered by the department. The retirement system from which the state employee is a retirant shall not be held responsible for any payment, and no adjustment or recalculation of benefit level will occur due to a retired state employee receiving recognition under this system.