Mich. Comp. Laws § 32.1064

Sec. 64. In acting on the findings and sentence of a court-martial, the convening authority may approve only those findings of guilty and the sentence or part or amount of the sentence as the convening authority finds correct in law and fact and as the convening authority in the authority's discretion approves. Unless the convening authority indicates otherwise, approval of the sentence is approval of the findings.