(a) A municipality having a state highway in its territory shall designate to the department the route in the municipality to be used by equipment described by § 623.121 moving over the state highway. The department shall show the designated route on each map routing the equipment.
(b) If a municipality does not designate a route, the department shall determine the route to be used by the equipment on the state highway within the municipality.

(c) A municipality may not require a fee or license for movement of a portable building unit on the route of a state highway designated by the department or the municipality.