Jones Boat Yard is wrong as regards to the Middle Level. It is not permitted under section 35 of the Middle Level Navagation By-Laws 2020.
35. Use of vessels with sanitary appliances
(i) Subject to the provisions of Byelaw 35(iii), the owner of a vessel shall not use or
knowingly permit to be used on a waterway any vessel provided with a sanitary appliance
of such design that polluting matter normally passes or can pass into a waterway.
(ii) Subject to the provisions of Byelaw 35(iii), where any vessel is fitted with a sanitary
appliance, such appliance shall be so designed, constructed and at all times maintained as
necessary to prevent any such passage as aforesaid.
(iii) (a) The owner of every vessel on a waterway, if such vessel is fitted with a sanitary
appliance so designed or constructed as to permit the passage into the waterway of
polluting matter, shall, as soon as practicable, give notice to the Commissioners,
specifying the nature of such appliance. The said owner shall also, upon being
requested by the Commissioners so to do, take such steps by way of sealing or
otherwise as may be reasonably necessary for preventing the passage into the
waterway of polluting matter from the vessel, so long as the vessel remains on the
waterways. So long as the vessel remains on the waterways, no interference or
alteration shall be made with the sealing or other steps so taken as aforesaid, except
with the consent of the Commissioners and
(b) The master of the vessel shall, at the request of an authorised officer (on production,
if so requested, of evidence of his authority), afford reasonable facilities to that
officer for the inspection of such sealing and other steps.
(iv) No person shall discharge or cause or permit to be discharged any polluting matter into
the waterways from any vessel or from any sanitary appliance used thereon.