The article focuses on customary international law as form of international law of the U.S. and the analysis of intermediate positions and defend of modern positions. It states that customary international law is unwritten law that regulates the relation of states. It also discusses the intermediate approach that was proposed by A. J. Belia and Bradford Clark and was considered as not really intermediate but also a convincing one.
Carlos M. Vazquez,
Customary International Law as U.S. Law: A Critique of the Revisionist and Intermediate Positions and a Defense of the Modern Position,
Notre Dame L. Rev.
Available at: https://scholarship.law.nd.edu/ndlr/vol86/iss4/3