Conn. Gen. Stat. § 16-7

The utility commissioners of the Public Utilities Regulatory Authority, or their designees, while engaged in the performance of their duties may, at all reasonable times, enter any premises, buildings, cars, plants or other places belonging to or controlled by any public service company, electric supplier or person involved in the transportation of gas, as such terms are defined in section 16-280a , and any person obstructing or in any way causing to be obstructed or hindered any utility commissioner of the Public Utilities Regulatory Authority or employee of the Public Utilities Regulatory Authority in the performance of his or her duties shall be fined not more than ten thousand dollars or imprisoned not more than six months, or both.