The second leg of international law is the treaty. Treaties can bind a nation in different ways, with ratification being the best known. The act of ratification signifies the consent of a nation to be legally bound by the terms of a particular treaty. In the United States, ratification of an international treaty requires Senate approval. After ratification, it has the same legal force as a federal law enacted by Congress, and its legal effect can only be denied by the withdrawal of a treaty, the enactment of a law by Congress, the enactment of a law to counter a treaty, or a finding by the courts that a treaty is unconstitutional. The treaty was concluded in 1979 and entered into force in 1984 for the raking parties, provided that five States that have ratified ratification have been completed. .