(a) A local government may purchase and furnish to the department a suitable locally identifying memorial marker.
(b) If the director approves the size and type of a marker, the department, on request, may erect the marker at a place most suitable to the department's maintenance operations.
(c) If two or more local governments cooperate in seeking a continuous memorial or other identifying designation, they may furnish to the department markers to be erected at each end of the designated limits and at intermediate sites so that markers are approximately 75 miles apart.
(d) The department shall maintain the grounds for a marker. The local government shall repair or replace a marker.