RSA 48-A:8 Additional Provisions of Ordinances, Codes, or Bylaws.

An ordinance, code or bylaw adopted by the governing body of the municipality may authorize the public agency and its delegated officers to exercise such powers as may be necessary or convenient to carry out and effectuate the purposes and provisions of this chapter, provided that such powers shall not be used to impose any additional restrictions on dwellings used as a vacation rental or short-term rental. Such powers shall include the following powers in addition to others herein granted:
I. To investigate the dwelling conditions in the municipality in order to determine which dwellings therein are unfit for human habitation;
II. To administer affirmations, examine witnesses and receive evidence;
III. To enter upon premises for the purpose of making examinations,