N.H. Rev. Stat. § 262:25
An appeal to the superior court of Merrimack county may be had from any final action or order of the director pursuant to this chapter within 30 days of the date of the final action or order. All findings of the director upon all questions of fact properly before him shall be deemed prima facie lawful and reasonable and shall not be disturbed on appeal, unless the court finds that they could not reasonably have been made. The action or order appealed from shall not be set aside or vacated unless the party appealing shall prove that the director acted illegally with respect to jurisdiction, authority, or observance of law. An appeal to the supreme court of New Hampshire may be had from any action or order of the superior court entered under RSA 262:25 in the same manner and form as such an appeal would be noted, perfected, and tried in any other criminal action.
RSA 262:25
RSA 262-B:9. 1969, 433:1. 1973, 584:7. 1981, 146:1. 1985, 213:14. 1987, 238:5, eff. July 17, 1987.