N.H. Rev. Stat. § 12-A:68

Municipalities, regional planning commissions, the coastal resilience and cultural and historic reserve district commission, and state agencies may establish coastal resilience and cultural and historic reserve districts, which shall comprise lands suitable and eligible as a reserve of sufficient elevation and distance from tidal and riverine waters for historic properties and other historic and cultural resources, including historic burial grounds. The acquisition of land and the acquisition, removal, restoration, and placement of such resources by municipalities, the coastal resilience and cultural and historic reserve district commission, and state agencies may be funded by municipal funding, including bonding, private and non-profit donations, funding from the land and community heritage investment trust program established RSA 227-M:7, the conservation number plate fund established in RSA 261:97-b, and funding from the state and federal government. Such districts may be established as municipal or regional development districts under RSA 162-K. An existing local historic district, as defined in RSA 674:45-50, may, upon recommendation by a municipal governing body, be designated by the coastal resilience and cultural and historic reserve district commission as a coastal resilience and cultural and historic reserve district.