This article explores existing legal sources to determine whether customary international law applies to land-based pollution of the high seas. The author begins by defining some important terms including land-based pollution of the high seas and customary international law . The author then discusses customary international law as it applies to the high seas and makes analogies to international rivers, air pollution, the law of hostile expeditions, and outer space. The author addresses customary international law that has been in existence since 1958 including treaties, declarations of international bodies, and published commentary
