5. Riparian owner to remove obstructions unless maintained for twenty years.—Any person obstructing the navigation hereinbefore described, by means of any weir, bridge, piles, dam, chain, barrier, or other impediment, shall be tiable to be calfed upon by the Conservators to remove the same, and his refusal to do so shall be deemed to be a continuing offence within the meaning of this Act, and the obstruction itself shall be deemed to be a nuisance to the navigation unless the same, or substantially the same, has been main- tained for the period of oventy years before the commencement of this Act.
6. Provision against shooting or use of firearms on the river, From and afer the passing of this Act it shall be unlawful to discharge any firearm, air- gun, gun, or similar instrument over or upon the said river within the limits aforesaid, or the banks or towpaths thereof, or any Innd acquired by the Con- servators under the provisions of this Act, and every person discharging any firearm, air-guo, gun, or similar instrument over or upon the said river limits as aforesaid, or the banks or towpath thereof, or any such land as aforesaid, shall be deemed to have committed an offence under this Act.
Part 1.—REGULATION OF PIRASURE-LOATS,
7. Registration of boats.—In addition to the rights and duties of the Con- servators relating to registration and tolls already created by the Thames Navigation Act, 1870, the Thames Conservancy Act, 1878, and the Thames Act, 1883, or by any other of the Acts in the First Schedule to this Act men- tioned, it shall be lawful for the Conservators to direct hy by-law that all boais or vessels, with the exception of any such class of boats or vessels as may, together with the reasons of such exception, be specified in any such by-law for pleasure navigation, shall be registered, together with the true names and adelresses of the owners thereof respectively, ina General Register to be kept at their chief office in a form ly them ta be prescribed, and as to all vessels propelled by steam pawer, and all house-boats, and all rowing or sailing boats plying for hire, and any such other particular class of boats or vessels as hy them from time to time by by-law, may be prescribed to issue licences to ply upon any part of the upper navigation, or upon a limited part thereof only, according to regulations in cach casc by them to be made by by-law in manoer hereiafter provided.
8. Navigating without registration to be an offence.—From and after the dates by any such by-law to be fixed respectively, it shall be an offence under this Act to use any boat or vessel of the class mentioned in the same-by-law, on any part of the river to which such by-law applies, unless such boat or vessel shall have been previously registered or licensed in manner therein provided.
9. Lists to be hept of private boats and boats fur kire.—In the General Register in the seventh section of this Act mentioned, separate lists shall be Kept of boats and vessels used for pleasure navigation by private owners, and of boats and vessels let for hire. ‘he former class of boats or vessels shall he distinguished, according to regulations to be made from time to time by the Conservators, hy a registercd number, crest, barge, or matk, and the latter class by a registered number ; and the provisions of section eleven and section thirteen of the Thames Act, 1883, as to displaying or concealing the same or umber of any steam-launch shall be deemed in all cases to apply to the
