Mich. Comp. Laws § 257.8a: "Conviction" defined.

Sec. 8a.

"Conviction" means any of the following:

(a) A final conviction, the payment of a fine, a plea of guilty or nolo contendere if accepted by the court, or a finding of guilt for a criminal law violation or a juvenile adjudication, probate court disposition, or juvenile disposition for a violation that if committed by an adult would be a crime, regardless of whether the penalty is rebated or suspended.

(b) A conviction defined in federal law under 49 CFR 383.5, regarding the operation of a commercial motor vehicle or the operation of a noncommercial motor vehicle operated by a person licensed to operate a commercial motor vehicle.