N.H. Rev. Stat. § 141-C:16-b
The commissioner, with the written approval of the governor, may order the cancellation of public gatherings and events within the state, or in specific geographic areas of the state, as is deemed necessary to prevent an imminent danger to the public health. Notice of any order canceling a public gathering or event shall be made in writing, shall specify the reason for the cancellation, and shall be delivered to the organizer of the event or owner of the venue where the event was to occur in a manner that will give as much notice prior to the cancellation as is reasonably possible. Notice shall also be given to the public in a manner that is reasonably likely to be available to the members of the public affected by the order. Such order shall be effective immediately and shall remain in effect in accordance with this section unless the superior court issues a decision directing otherwise. Any person who is aggrieved by an order pursuant to this section may request a hearing in the superior court to contest that order. The superior court shall schedule and hold a hearing and issue a decision within 5 working days of the court's receipt of the request for a hearing, unless a shorter period is required for review. At the hearing, the burden of proof shall be on the commissioner to prove by clear and convincing evidence that cancellation of the public gathering or event is reasonably necessary to protect the health of the public.
RSA 141-C:16-b
2008, 336:2, eff. July 7, 2008.