2. An efficient watch shall be kept continuously on board stationary vessels carrying the markings provided for in article 3.14. However, the competent authorities may exempt vessels berthed in harbour basins from this requirement.
3. An efficient watch shall be kept continuously on board of passenger vessels while passengers are on board.
4. All other berthed vessels, assemblies of floating material and floating installations shall be kept under surveillance by a person capable of acting quickly if the need arises, unless such surveillance is rendered unnecessary by local conditions or is waived by the competent authorities.
5. When the vessel has no boatmaster, the responsibility for setting up such a watch or surveillance shall lie with the operator and, in case the operator is not identifiable, with the owner.