N.H. Rev. Stat. § 21-N:10-a
The state board of education shall provide the opportunity for the public comment on educational matters at meetings of the state board. The public comment period shall be for no less than 30 minutes. The state board of education may request that persons register in advance of the meeting, but may not require pre-registration as a condition of participating in the public comment period. The state board of education may impose reasonable time limits for each speaker, provided such time limits are equal for all speakers. Nothing in this section shall restrict the state board of education from establishing other reasonable standards for the public comment period, provided such standards are imposed equally for all speakers. The state board of education may reasonably restrict public comments that disclose student personally-identifiable information, teacher personally-identifiable information, or other confidential or privileged information.
RSA 21-N:10-a