Unless the context otherwise requires, as used in this Part:
(a) The term main means a pipeline located on a public or private right-of-way which is generally available or used to transport gas to more than one service line.
(b) The term service line means a piping, including associated metering and pressure reducing appurtenances, that transports gas below grade from a main to the first accessible fitting inside the wall of a customer's building when a meter is located within the building; if a meter is located outside the building, the service line will be deemed to terminate at the outside of the building foundation wall.
(c) The term public right-of-way means the territorial limits of any street, avenue, road or way (other than a limited access thoroughfare) that is for any highway purpose under the jurisdiction of the State of New York or the legislative body of any county, city, town or village and is open to public use.
(d) The term adjusted gas revenue means the revenue realized from the applicable service classification rates and charges, minus revenue taxes, the minimum charge and the cost of gas.