If the regulator after the public hearing approves the application for a permit and determines it is not prohibited by N.H. Rev. Stat. § 155-E:4 it shall, upon receipt of an excavation fee determined by the regulator not to exceed $50 and the posting of a bond or other such surety with the municipal treasurer in an amount, as it requires, reasonably sufficient to guarantee compliance with the permit, grant a permit to the applicant for an excavation. A copy of the permit shall be prominently posted at the excavation site or the principal access thereto. A permit shall not be assignable or transferable without the prior written consent of the regulator. A permit shall specify the date upon which it expires. The regulator may include in a permit such reasonable conditions as are consistent with the purpose of this chapter and may include requirements for a permit for excavation which are more stringent than the standards set forth in this chapter including the provision of visual barriers to the excavation.