RSA 365:5: Independent Inquiry.

The commission, on its own motion or upon petition of a public utility, and the department of energy may investigate or make inquiry in a manner to be determined by it as to any rate charged or proposed or as to any act or thing having been done, or having been omitted or proposed by any public utility; and shall make such inquiry in regard to any rate charged or proposed or to any act or thing having been done or having been omitted or proposed by any such utility in violation of any provision of law or order of the commission or the department.