Looked it up to see if the municipality had anything in writing. They do.
Commerce Township Zoning Ordinance Article 30 Signs
SECTION 30.08. SIGN REMOVAL BY TOWNSHIP ACTION.
E. Temporary Signs.
Temporary signs affixed within a road right-of-way or corner clearance area, without a valid permit, or after permit expiration may be removed by the Township without notice. Signs removed shall be discarded.