Rule 7. Within the natural river district, a 50-foot minimum restrictive cutting belt shall be maintained on each side of the mainstream of the Huron river and on Arms, Davis, and Mill creeks. Trees and shrubs may be pruned for a filtered view of the river upon approval of the zoning administrator or the area forester, but clear cutting in the natural vegetation strip is prohibited. The natural vegetation strip is also subject to both of the following provisions:
Mich. Admin. Code R. 281.157