Mich. Comp. Laws § 750.145b

Sec. 145b. (1) A person convicted of violating section 145a who has 1 or more prior convictions is guilty of a felony punishable by imprisonment for not more than 10 years or a fine of not more than $10,000.00, or both. (2) If the prosecuting attorney intends to seek an enhanced sentence based upon the defendant having 1 or more prior convictions, the prosecuting attorney shall include on the complaint and information a statement listing the prior conviction or convictions. The existence of the defendant's prior conviction or convictions shall be determined by the court, without a jury, at sentencing or at a separate hearing for that purpose before sentencing. The existence of a prior conviction may be established by any evidence relevant for that purpose, including, but not limited to, 1 or more of the following: (a) A copy of the judgment of conviction. (b) A transcript of a prior trial, plea-taking, or sentencing. (c) Information contained in a presentence report. (d) The defendant's statement. (3) As used in this section, "prior conviction" means a violation of section 145a or a violation of a law of another state substantially corresponding to section 145a.