1. In this act, the terms hereinafter mean or designate respectively:(a) “gas” : natural gas, manufactured gas, any variety or any mixture of either, liquefied petroleum gas or any mixture of liquefied petroleum gas and air, conveyed or distributed by tubing;
(b) “gas undertaking”, or “undertaking” when such word designates a gas undertaking: any undertaking for the sale, storage, conveyance or distribution of gas in Québec;
(c) “gas distributor”, or “distributor” when such word designates a gas distributor: any person, firm or corporation carrying on a gas undertaking as owner, lessee, trustee, liquidator or assignee;
(d) “electricity undertaking” : any undertaking for the production, sale or distribution of electricity;
(e) “electricity distributor” or “distributor” when such word designates an electricity distributor: any person, firm or corporation carrying on an electricity undertaking; such terms also include their lessees, trustees, liquidators or assignees, but do not include municipal corporations, Hydro-Québec or any cooperative established under the Rural Electrification Act (1945, c. 48);
(f) “Board” : the board constituted by section 2.