N.H. Rev. Stat. § 31:104
Notwithstanding any provisions of law to the contrary, no member of the governing board of any municipal corporation or political subdivision, no member of any other board, commission, or bureau of any municipal corporation or political subdivision created or existing pursuant to a statute or charter, and no chief executive officer of such municipal corporation or political subdivision, including but not limited to city councilors and aldermen, selectmen, county convention members, members of boards of adjustment, members of planning boards, school board members, mayors, city managers, town managers, county commissioners, regional planning commissioners, town and city health officers, overseers of public welfare, and school superintendents shall be held liable for civil damages for any vote, resolution, or decision made by said person acting in his or her official capacity in good faith and within the scope of his or her authority.
RSA 31:104
1973, 595:1. 1991, 72:1, eff. July 12, 1991. 2008, 96 : 1 , eff. Jan. 1, 2009. 2010, 214 : 1 , eff. Jan. 1, 2011.