N.H. Rev. Stat. § 374:24
No permission under RSA 374:22 shall be granted to any business entity not organized under the laws of this state, and no authority to transfer or lease the franchises, works, or system, or any part of the franchises, works, or system of any public utility in this state to any such business entity shall be granted under RSA 374:30. Business entities which are public utilities organized under the laws of another state and which furnish utility service in towns outside the state may furnish utility service to New Hampshire towns adjacent to the state boundaries when the public utilities commission finds this service to be in the public interest.
RSA 374:24
1913, 145:13. PL 240 :22. RL 289:22. RSA 374:24. 1967, 181:1. 1981, 449:3, eff. Aug. 22, 1981.