23.—(1) Any person bringing a freight container containing any dangerous substance into a harbour or harbour area from inland shall ensure that that container is accompanied by a certificate, given by the person responsible for loading the dangerous substance into the freight container, certifying that the substance has been safely packed inside that container.
(2) A person opening a freight container containing any dangerous substance shall take sufficient precautions to protect himself and others in the vicinity from the effect of any spillage or escape of any dangerous substance and shall adequately ventilate the interior before entering the freight container or unloading anything from that container and, if he is an employee, his employer shall also ensure that he takes such precautions.