Mich. Comp. Laws § 32.523

Sec. 123. In construing the term "line of duty" the recorded opinions of the judge advocate general of the United States armed forces in like cases or circumstances or involving like principles, insofar as not contrary to this act, shall govern and be applied to line of duty cases arising under this act. Actions of members of the state military establishment while on duty are presumed to be in line of duty unless clearly shown to have been otherwise, under the provisions of this act.