(o)the traffic which may be carried on the tramway, the traffic which the promoter or lessee shall be bound to carry, and the traffic which he may refuse to carry; the tolls to be leviable by the promoter or lessee, and the periodical revision thereof by the [Government] [Substituted 'Local Government' by the A.O. 1937.]; and the regulation of the traffic and of the levy of the tolls;