The integrated coastal management (ICM) asserts itself as a process of territorial recomposition and as an operational model of environmental governance. Coastal areas are especially vulnerable to ecosystems disturbances and disruptions so their management is questioning responsibilities and efficiency of international cooperation. The principle of common but differenciated responsibilities (PCDR) based on similar legal references with ICM in accordance with the Global Environmental Partnership established at 1992 Rio Conference, participates to develop a reflection on sustainable management of coastal areas related to moral and judicial responsibility. The PCDR put into perspective ICM in international cooperation. The making of ICM objectives are converging to PCDR orientations concerning international environmental governance. ICM conducts States, national authorities and International community to assume common but differenciated responsibilities in the field of coastal management. Based on integration, inderdependancy and participation, ICM gives a concrete implementation of the PCDR, surpassing the traditional conception of territoriality and then overcoming limits of the principle. It leads to consider the emergence of a new global territorial order.