Construction, excavation or other development on slopes of 15% or greater shall be subject to the regulations set out in steep slopes provisions found in § 132-30 of this chapter, with the exception of farming activities. No such construction, excavation or other development shall be commenced on slopes of 15% or greater until a permit for same has been issued with respect thereto by the CEO subsequent to proper application having been made pursuant to § 132-30. Any excavation related to timber and/or firewood harvesting, including but not limited to skid trails, forest roads, haul roads, landings and stream crossings, shall be subject to the steep slopes provisions of § 132-30.