N.H. Rev. Stat. Ann. § 230-A:8

The corridor permit requirement shall be in addition to other federal, state or local permits which may be required for such development, and no development shall be exempt from a corridor permit by reason of any other permit, any grandfather clause, or any other exemption. Authorities issuing other development permits should inform applicants of the corridor permit requirement, but the corridor designation shall not interfere with or delay other development permit procedure, unless agreed to by the applicant. No zoning or other land use ordinance or regulation shall be deemed or required to be altered or modified by the creation of the corridor, but any permits issued under any such ordinance or regulation shall be deemed conditional upon the corridor permit.