Section 15 Interpretation of Part I.

In this Part of this Act:—

• . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F1

• “undertaking” means any public utility undertaking or any undertaking by way of any trade or business;

and any reference in this Part of this Act to articles shall be construed as including a reference to substances, vehicles, vessels or animals.