Before revision: Think Again: The Arctic Obstacles that remain include United States non-ratification of the UNCLOS and the harmonizing of all UNCLOS territorial claims (most notably extended continental shelf claims along the Lomonosov Ridge); the dispute over the Northwest Passage; and securing agreements on regulations regarding shipping, tourism, and resource development in Arctic waters.
After revision: Obstacles that remain include United States non-ratification of the UNCLOS and the harmonizing of all UNCLOS territorial claims (most notably extended continental shelf claims along the Lomonosov Ridge); the dispute over the Northwest Passage; and securing agreements on regulations regarding shipping, tourism, and resource development in Arctic waters.