N.H. Rev. Stat. § 12-G:39

In addition to any other power or authority conferred on the authority under this chapter, the authority, with the approval of the governor and council, may, in the name of the state, purchase, lease, or otherwise acquire lands or interests in land, including options, on, near, or adjacent to the state tidal waters suitable for constructing, establishing, and maintaining thereon piers, wharves, docks, warehouses, or other facilities useful and necessary in the encouragement and development of commercial navigation. Before making any such purchase or acquisition, the authority shall submit to the governor and council a detailed description of the land or interests therein to be acquired, together with a statement of the purposes for which the property is suited and the cost of acquisition and estimated cost of development, as well as such other information as the governor and council shall require. The authority, with the approval of the governor and council, may accept gifts of land; and may in like manner accept and apply to the purchase of land or the development thereof, contributions, gifts, or aid in any form made or given for the purpose by any person, firm, or corporation, or by any municipality or by the United States, and may execute instruments necessary to qualify for such contributions, gifts, or aid. Any land or interest in land acquired by the authority pursuant to this section shall be considered division property and not airport property and shall not be included in the airport district.