13. The physical assets of such undertaking shall comprise only the rights held by such electricity distributor in the falls, rapids, hydraulic powers, dams, constructions, works of all kinds, machinery, moveables and immoveables, forming a useful part of the undertaking, and in all leases connected with the undertaking, valued for the period of their duration, without figuring upon the possibility of renewal.
R. S. 1964, c. 87, s. 13.