ensure that areas that share major geographical features (islands, lakes, rivers, sea basins or mountain ranges) support the joint management and promotion of their natural resources;
a áirithiú go dtacaítear le comhbhainistiú agus le cur chun cinn acmhainní nádúrtha na limistéar a chomhroinneann mórghnéithe geografacha (oileáin, lochanna, aibhneacha, imchuacha farraige nó sliabhraonta);