Mich. Comp. Laws § 168.492a: Registration of persons confined in jail.

Sec. 492a.

An individual who is confined in a jail and who is otherwise a qualified elector may, before trial or sentence, register to vote. The individual is considered a resident of the city or township, and address, at which he or she resided before confinement. An individual who is confined in a jail after being convicted and sentenced is not eligible to register to vote.