After the preamble, there are numbered articles that contain the content of the actual agreement of the parties. Each article title usually includes one paragraph. A long contract can group other articles under chapter titles. Before 1871, the U.S. government regularly entered into contracts with Indians, but the Indians Appropriation Act of March 3, 1871 (Chapter 120, 16 Stat. 563) had a horseman (25 US. C No. 71), which effectively ended the drafting of presidential treaties by declaring that no Indian nation or Indian tribe can be recognized as a nation, tribe or independent power with which the United States can enter into contractual contracts. After 1871, the federal government continued to maintain similar contractual relations with Indian tribes through agreements, statutes and executive ordinances.  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 Tribunal found that treaties are subject to constitutional control and occupy the same hierarchical position as ordinary legislation (leis ordinrias, or „ordinary laws“ in Portuguese). A recent ruling by Brazil`s Supreme Court in 2008 changed this situation somewhat by finding that treaties containing human rights provisions have a higher status than ordinary legislation, subject to the Constitution itself. In addition, the 45th Amendment to the Constitution provides for human rights treaties, approved by Congress as part of a specific procedure, the same hierarchical position as a constitutional amendment. The hierarchical position of the treaties with regard to national legislation is important for the debate on whether and how the former can cancel and vice versa. „Any treaty and international agreement reached by a member of the United Nations … Be registered and published by the Secretariat as soon as possible.“ (Article 102 of the Charter of the United Nations) In addition to treaties, there are other less formal international agreements. These include efforts such as the Proliferation Security Initiative (PSI) and the G7 Global Partnership Against the Proliferation of Weapons of Mass Destruction.
Although the PSI has a „declaration of prohibition principles“ and the G7 Global Partnership includes several statements by G7 heads of state and government, it also does not have a legally binding document that sets specific obligations and is signed or ratified by member states. Bilateral agreements are concluded between two states or entities.  A bilateral contract may have more than two parts; Thus, each bilateral treaty between Switzerland and the European Union (EU) has seventeen parties: the parties are divided into two groups: the Swiss („on the one hand“) and the EU and its member states („on the other side“). The treaty establishes rights and obligations between Switzerland and the EU and the Member States for several years – it does not create rights and obligations between the EU and its member states. [Citation required] The IHR (2005) is an international agreement between 194 States Parties and the World Health Organization on surveillance, sunshine and response to all events that could pose a threat to international public health.