N.H. Rev. Stat. § 261:75-a
A duly sworn state, county, or local law enforcement officer in the performance of his or her duties may obtain, through electronic query from the department of safety, the registration information on a particular number plate and plate type or number plate validation decal for any official purpose, whether the inquiry relates to a particular offense or is for general crime detection and prevention purposes, provided a record is kept regarding such inquiry. The information so obtained shall only be used for valid law enforcement purposes and shall not be disclosed to any unauthorized person for any purpose. The commissioner of safety may further limit the release of such information at his or her discretion.
RSA 261:75-a
2007, 335:1, eff. July 16, 2007.