N.H. Rev. Stat. § 507-B:7-a
It shall be lawful for the state or any municipal subdivision thereof, including any county, city, town, school district, school administrative unit or other district, to procure the policies of insurance described in RSA 412. In any action against the state or any municipal subdivision thereof to enforce liability on account of a risk so insured against, the insuring company or state or municipal subdivision thereof shall not be allowed to plead as a defense immunity from liability for damages resulting from the performance of governmental functions, and its liability shall be determined as in the case of a private corporation except when a standard of care differing from that of a private corporation is set forth by statute; provided, however, that liability in any such case shall not exceed the limits of coverage specified in the policy of insurance or as to governmental units defined in RSA 507-B, liability shall not exceed the policy limit or the limit specified in RSA 507-B:4, if applicable, whichever is higher, and the court shall abate any verdict in any such action to the extent that it exceeds such limit.
RSA 507-B:7-a
2003, 144 : 14 , eff. Jan. 1, 2004.