with regard to the financial and monetary principles established at a meeting of allied nations in the American city of Bretton Woods in 1944, the end of the preamble and the beginning of the actual agreement are often marked by the words “agreed as follows.” Under international law, a treaty is a legally binding agreement between states (countries). A treaty can be called a convention, protocol, pact, agreement, etc. It is the content of the agreement, not its name, that makes it a treaty. Thus, the Geneva Protocol and the Biological Weapons Convention are the two treaties, although neither treaty in its name. Under U.S. law, a treaty is a legally binding agreement between countries that requires ratification and “consultation and approval” of the Senate. All other agreements (internationally treated) are called executive agreements, but are nevertheless legally binding on the United States under international law. The Constitution does not have a supremacy clause with the same effects as those of the U.S. Constitution, which interests the debate on the relationship between treaties and the laws of the states of Brazil.
Contracts must be advised and approved by two-thirds of the senators present, but executive agreements can be executed by the president alone. Some contracts give the president the power to fill gaps through executive agreements rather than additional contracts or protocols. Finally, agreements between Congress and the executive branch require the approval of the House of Representatives and the Senate before or after the president signs the treaty. In the United States, executive agreements are made exclusively by the President of the United States. They are one of three mechanisms through which the United States makes binding international commitments. Some authors view executive agreements as treaties of international law because they bind both the United States and another sovereign state. However, under U.S. constitutional law, executive agreements are not considered treaties within the meaning of the U.S. contractual clause. A multilateral agreement is reached between several countries, which establishes rights and obligations between each party and each other party.
 Multilateral treaties may be regional or involve states from around the world.  “Mutual guarantee” treaties are international pacts, for example. B the Treaty of Locarno, which guarantees each signatory the attack of another.  a formal agreement between the governments of different countries on their behaviour towards others or towards the population of their country, the Un Convention on International Goods Contracts: a treaty concluded in 1980 for the unification of international trade law.