48:3-1. Unjust or unreasonable discriminations or classifications of rates; "board" defined
No public utility shall:
a. Make, impose or exact any unjust or unreasonable, unjustly discriminatory or unduly preferential individual or joint rate, commutation rate, mileage and other special rate, toll, fare, charge or schedule for any product or service supplied or rendered by it within this state;
b. Adopt or impose any unjust or unreasonable classification in the making or as the basis of any individual or joint rate, toll, fare, charge or schedule for any product or service rendered by it within this state.
The word "board" as used in this chapter shall mean the board of public utility commissioners.