Power to make rules.- (1) Subject to the previous approval of the

(d) generally to carry out the purposes of this Act; and when the tolls of a ferry have been let under section 8, such Financial Commissioner or other officer may, from time to time (subject as aforesaid), make additional rules consistent with this Act; (e) for collecting the rents payable for the tolls of such ferries; (f) in cases in which the communication is to be established by means of a bridge of boats, pontoons or rafts, or a swing-bridge, flying-bridge or temporary bridge, for regulating the time and manner at and in which such bridge shall be constructed and maintained and opened for the passage of vessels and rafts through the same; and (g) in cases in which the traffic is conveyed in boats for regulating- (i) the number and kind of such boats and their dimensions and equipment; (ii) the number of the crew to be kept by the lessee for each boat; (iii) the maintenance of such boats continually in good condition; (iv) the hours during which, and the intervals within which, the lessee shall be bound to ply; and (v) the number of passengers, animals and vehicles, and the bulk and weight of other things, that may be carried in each kind of boat at one trip. (2) The lessee shall make such returns of traffic as the Deputy Commissioner of the District or other officer as aforesaid may, from time to time, require.