RSA 378:6 Suspension of Schedule.

I. (a) Pending any investigation of a rate schedule which represents a general increase in rates and the decision thereon, the commission may, by an order served upon the public utility affected, suspend the taking effect of said schedule and forbid the demanding or collecting of the rates, fares, charges or prices covered by the schedule for such period or periods, not to exceed 12 months in all, as in the judgment of the commission may be necessary for such investigation, except as provided in paragraph II.
(b) Except as provided in RSA 378:6, IV, for all other schedules filed with the commission, the commission may, by an order served upon the public utility affected, suspend the taking effect of said schedule and forbid the demanding or collecting of rates, fares, charges