Where practicable, routine cleaning of the ballast tank to remove sediments should be carried out in mid-ocean or under controlled arrangements in port or dry dock, in accordance with the provisions of the ship's Ballast Water Management Plan.
(1) Under Regulation 11: answer all questions as to health conditions on board put to him by a customs officer or authorised officer on arrival in port or if already in port; (2) under Regulation 13: report, before arrival, any infectious disease, etc. on board; and, (3) under Regulation 15: if there was anything to report under Reg. 13, complete a Maritime Declaration of Health.
Before arrival, either directly to the local authority or through an agent approved by the local authority, by radio, fax, email or other communications, so as to reach the local authority not more than twelve hours, and whenever practicable not less than four hours, before the expected arrival of the ship.