Michigan Compiled Laws, Chapters 760 to 777 Code of Criminal Procedure § 769.8

Sec. 8. (1) When a person is convicted for the first time for committing a felony and the punishment prescribed by law for that offense may be imprisonment in a state prison, the court imposing sentence shall not fix a definite term of imprisonment, but shall fix a minimum term, except as otherwise provided in this chapter. The maximum penalty provided by law shall be the maximum sentence in all cases except as provided in this chapter and shall be stated by the judge in imposing the sentence.

(2) Before or at the time of imposing sentence, the judge shall ascertain by examining the defendant under oath, or otherwise, and by other evidence as can be obtained tending to indicate briefly the causes of the defendant's criminal character or conduct, which facts and other facts that appear to be pertinent in the case the judge shall cause to be entered upon the minutes of the court.