(1) Paragraphs (4) to (6) apply in relation to a direction given under Part 7 (Aircraft) or Part 8 (Ships).
(2) A direction under regulation 65(7) or (9) may be given to any airport operator or to airport operators generally.
(3) A direction under regulation 72(3) may be given to any harbour authority or to harbour authorities generally.
(4) A person to whom a direction is given has a duty to comply with it.
(5) A direction may be of indefinite duration or a defined duration.
(6) A person who gives a direction may vary, revoke or suspend it at any time.