RSA 674:56 Flood Hazards.

I. Municipalities may adopt floodplain ordinances as part of their enrollment in the National Flood Insurance Program. Such ordinances shall be adopted pursuant to the authority granted under RSA 674:16 and 17, and shall be adopted and amended pursuant to the procedures in RSA 675 for the adoption and amendment of zoning ordinances. Municipalities may adopt floodplain ordinances either as an amendment to an existing zoning ordinance or as a separate ordinance. A municipality which adopts a floodplain ordinance which is separate from its zoning ordinance or without otherwise having adopted a zoning ordinance, shall observe all legal and procedural requirements for the floodplain ordinance that would be required for a zoning ordinance, including the creation of a board of adjustment.