ker prisilni predpisi v nekaterih državah članicah določajo metode, po katerih se lahko umerjajo in uporabljajo za merjenje njihove vsebine cisterne, vključno z bunkerji za tekoče gorivo, na plovilih za notranje plovne poti ter na nacionalnih in mednarodnih tovornih ladjah za obalno plovbo;
Whereas in several Member States mandatory provisions lay down the methods by which the tanks, including the liquid fuel bunkers, of inland waterway vessels and of national and international coasters may be calibrated and used to measure their contents;