N.H. Rev. Stat. § 21-U:3

I. The member agencies shall cooperate with one another to share relevant agency data for the purpose of conducting audits, examinations, investigations, administrative enforcement proceedings, and/or civil agency enforcement actions. II. A member agency is not required to cooperate with another member agency to share agency data if the 2 member agencies are engaged, or about to be engaged, in a contested action or proceeding in contradictory roles. III. A member agency, except as otherwise provided in this chapter, shall preserve any privilege or confidentiality regarding agency data or shared data it receives from another member agency pursuant to this chapter. In the case where the providing member agency itself received the information or documents from another source whether the source is a New Hampshire agency or an agency of another state, the federal government, or any foreign government, the receiving member agency shall preserve any such privilege or confidentiality placed on the use of the information or documents by such source. In addition, except as provided in this chapter, the receiving member agency may assert on its own behalf any legal limitation upon release or privilege to which it is entitled.