(a) As used in this Part:
(1) Apartment building means a building, either rented, leased, let or hired out, or containing separately owned condominium or cooperative apartment units, to be occupied or is occupied as the residence of three or more families living independently of each other.
(2) Operator means a person who engages in the transportation of gas.
(3) Person means any individual, firm, joint venture, partnership, corporation, association, State, municipality, cooperative association, or joint stock association, and including any trustee, receiver, assignee, or personal representative thereof.
(4) Transportation of gas means the transmission or distribution of gas by pipeline or the storage of gas.