Mich. Admin. Code R. 247.101
(4) "Industrial activity" means an activity generally recognized as an industrial activity by the zoning authorities in this state, except that none of the following shall be considered an industrial activity:
(5) "Unzoned industrial area" means land occupied by a regularly used building, parking lot, storage area or processing area of an industrial activity, and land within 1,000 feet of the nearest edge of the right-of-way which meets all of the following:
History: 1979 AC.