.3 Alle ventiler og haner i rørsystemer såsom lænse- og ballastsystemer, brændsels- og smøreoliesystemer, brandsluknings- og spulesystemer, kølevandssystemer og sanitære systemer mv. skal være tydeligt mærket med deres funktioner.
.3 All valves and taps in pipe systems such as bilge and ballast systems, fuel oil and lubricating oil systems, fire extinguishing and sluicing systems, cooling water and sanitary systems, etc. shall be clearly marked as to their functions.