N.H. Rev. Stat. Ann. § 125-F:16

This chapter shall not be construed as repealing any laws of the state relating to radiation sources, exposures, radiation protection, and professional licensure, but shall be held and construed as auxiliary and supplementary to them, except to the extent that they are in direct conflict, in which case this chapter shall be controlling. Nothing in this chapter or in any rules adopted under it shall preclude the right of any governing body of a municipality to adopt ordinances, regulations, or rules not inconsistent with this chapter.