N.H. Rev. Stat. § 21-G:31-a

I. Any executive branch official may request, in writing, an advisory opinion regarding the application of any law, guideline, or rule within the committee's jurisdiction to a specific factual situation pertinent to the requester's conduct or proposed conduct. Notwithstanding any other provision of law, all proceedings, information, communications, materials, papers, files, and transcripts, written or oral, received or developed by the committee in the course of its work in response to a request for an advisory opinion, except for the opinion itself, shall be confidential. The advisory opinion shall be made public but the name of the person seeking the opinion and any information in the opinion that would identify such person shall be nonpublic. II. Any advisory opinion concerning any person subject to the provisions of this subdivision who acted in reliance thereon, shall be binding upon the committee, and it shall be an absolute defense in any complaint brought under this subdivision or prosecution under RSA 15-A or RSA 15-B that the person complained against acted in reliance upon such advisory opinion.