Section R. 259.292 - Zoning ordinancesRule 292.
(1) In areas surrounding a public use airport for which zoning ordinances or resolutions have not been adopted by local units of government, no person shall erect, add to the height of, or replace any object within an area lying 500 feet on either side of the centerline of a runway or landing strip for a distance of 2 miles from the nearest boundary of a public use airport, which will result in an object extending higher than the height determined by the ratio of 20:1 between the nearest boundary of the airport and the object.(2) In areas for which zoning ordinances or resolutions have been adopted by local units of government, no person shall erect, add to the height of, or replace an object except as authorized by the local zoning ordinance. Outside of locally zoned territory and within an area determined by the extensions of the approach surface and the transitional surface on the same slope ratios established under the local zoning ordinance or resolution, but not to exceed a slope ratio of 40:1 for the approach surface, or 7:1 for the transitional surface, to a point where the extended approach and transitional surfaces intersect the 500-foot level described in R 259.291, no object shall be erected, altered by increasing its height, or replaced until a permit therefor has been obtained from the commission.Mich. Admin. Code R. 259.292