Mich. Comp. Laws § 35.881

Sec. 1. The military museum shall be kept in the rotunda in the capitol on the basement floor, until such time as the state provides a grand army memorial building. The battle flags shall be kept in the cases they now occupy, in the rotunda on the 1st floor of the capitol, for all time and never be taken out unless some other provisions shall be made by the legislature in reference thereto.