20.—(1) The Council may make such byelaws as it thinks fit for the efficient management and regulation of the harbour.
(2) Without prejudice to paragraph (1), the Council may make byelaws under this article for any of the purposes set out in Schedule 1 but such byelaws shall not come into operation until the same have received the allowance and the confirmation of the Secretary of State which shall be sufficient for all purposes.
(3) In this article “signals” includes sound signals.
(4) Byelaws made under this article may—
(a)provide for imposing upon a person offending against them, or against any condition, requirement or direction imposed, made or given thereunder, a fine not exceeding level 4 on the standard scale on summary conviction;
(b)relate to the whole of the harbour or to any part thereof;
(c)make different provisions for different parts of the harbour or in relation to different classes of vessels or vehicles; and
(d)otherwise make different provision for different circumstances.
(5) Where a person is charged with an offence against a byelaw in force under this article, it shall be a defence for the person to prove—
(a)that they took all reasonable precautions and exercised all due diligence to avoid the commission of such an offence;
(b)that they had a reasonable excuse for their act or failure to act; or
(c)that the offence was not caused or facilitated by any act or neglect on their part or on the part of any person engaged or employed by them and that all reasonable steps were taken to prevent the commission of the offence.
(6) The provisions contained in subsections (3) to (8) of section 236 (Procedure etc., for byelaws) and section 238 (Evidence of byelaws) of the Local Government Act 1972(1) (which relates to the procedure etc. for byelaws and evidence of byelaws) shall apply to any byelaws made by the Council under this article; and those provisions, in their application to any such byelaws, shall have effect.