16. If the undertaker permanently ceases to operate any of the authorised street tramways (“the discontinued tramway”), it shall as soon as reasonably practicable and unless otherwise agreed with the street authority—
(a)remove from any street in which the discontinued tramway is laid the rails and any other works, equipment and apparatus which have become redundant; and
(b)restore, to the reasonable satisfaction of the street authority, the portion of the street along which the discontinued tramway was laid regard being had to the condition of the street before the tramway was laid.