The authority may display or publish a notice (a waterways notice) in the way required under section 24 to control activities or conduct in Gold Coast waters for the following purposes—
(a) maintaining or improving the effective and efficient management of the Gold Coast waterways;
(b) maintaining fair and reasonable access to public marine facilities for users of the Gold Coast waterways;
(c) moving or mooring watercraft, or controlling activities on or by watercraft, in Gold Coast waters.