Given that the United States has not ratified UNCLOS, U.S. nationals may not serve as members of the Commission on the Limits of the Continental Shelf. It is not clear whether the United States, as a non-state party, can even make a legally recognized submission to the commission to assert its claim and fully protect its proprietary rights and energy interests. In contrast, Russia, which may be entitled to almost half of the Artic region’s area and coastline, has already made its submission for vastly extending its continental margin, including a claim to the Lomonosov Ridge, an undersea feature spanning the Arctic from Russia to Canada. Russia and Canada are the two countries with which the United States has potentially overlapping extended continental shelf claims.
This maritime boundary dispute is no small matter. The U.S. Geological Survey estimates that the Arctic holds 22 percent of the world’s undiscovered oil and gas, amounting to more than 412 billion barrels of oil equivalent. Legal certainty in maritime delimitation is critically important for Arctic states and their respective energy companies. On June 8, 2012, Rex Tillerson, as chairman and CEO of ExxonMobil, wrote to the Senate Foreign Relations Committee to vociferously urge U.S. accession to UNCLOS:
“Perhaps the best example of the need for certainty in an area with great unexplored potential involves the Arctic Ocean…Several countries, including the United States, are provided with a claim to extended exploitation rights under the application of UNCLOS in the Arctic. The legal basis of claims is an important element to the stability of property rights.”
In the absence of treaty ratification, Tillerson noted that the United States suffers from the dual disadvantage of having both a cloud over the international status of U.S. claims and a weakened ability to challenge other states’ conflicting claims.