The cars and carriages of the grantees on the lines of the tramways shall be worked with such power, animal or mechanical as the grantees may think suitable :Provided that no steam-carriages shall be used without the special consent of the Corporation to be obtained in special general meeting of the Commissioners, and without the sanction of the [State Government] [Words substituted by the Government of India (Adaptation of Indian Laws) Order, 1937 and the Adaptation of Laws Order, 1950.].
