Mich. Comp. Laws § 256.661

Sec. 41. (1) Except as otherwise provided in this section, a segment 1 or segment 2 classroom shall not contain more than 36 students when classroom instruction is given. (2) A segment 2 class size may exceed 36 students with the prior approval of the secretary of state. The secretary of state may approve a segment 2 class size to exceed 36 students for up to 60 minutes per day when justified by a special presentation. (3) The number of students in a class shall not exceed the number of students allowed by the fire marshal.