At present, the likelihood of international agreements being concluded through executive agreements is ten times more likely. Despite the relative ease of executive agreements, the president still often chooses to follow the formal contractual process of an executive agreement in order to gain congressional support on issues that require Congress to pass implementing legislation or appropriate means, as well as agreements that impose complex long-term legal obligations on the United States. For example, the agreement between the United States, Iran and other countries is not a treaty. There are three ways to amend an existing treaty. First, a formal amendment requires States parties to go through the ratification process again. The renegotiation of contractual provisions can be lengthy and time-consuming, and often some parties to the original treaty do not become parties to the amended treaty. In determining the legal obligations of States, a party to the original treaty and a party to the amended treaty, States are bound only on the conditions on which they have both agreed. Contracts may also be amended informally by the council of contractual experts if the amendments are only procedural, technical amendments to the international law of usage may also modify a treaty if the conduct of the State demonstrates a new interpretation of the legal obligations under the treaty. Minor corrections may be made to a contract by a report; However, a record is usually reserved for amendments aimed at correcting obvious errors in the adopted text, i.e.
if the adopted text does not adequately reflect the intention of the parties adopting it. In international law, a treaty is any legally binding agreement between states (countries). A treaty can be called a convention, protocol, pact, agreement, etc.c 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 no one has the word “treaty” in its name. Under U.S. law, a treaty is specifically a legally binding agreement between countries that requires ratification and “deliberation and approval” by the Senate. All other agreements (treaties in the international sense of the term) are called executive agreements, but are nevertheless legally binding under international law to the United States. In international law and international relations, a protocol is usually an international treaty or agreement that complements an earlier treaty or international agreement. A protocol may amend the previous contract or add additional provisions.
The parties to the previous agreement are not obliged to adopt the protocol. This is sometimes clearer by referring to it as an “optional protocol”, especially when many parties to the first agreement do not support the protocol. 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 Spread of Mass Destruction. Although the PSI has a “Declaration of Prohibition Principles” and the G7 Global Partnership, several G7 leaders` declarations, neither has a legally binding document, which sets out specific commitments and is signed or ratified by member states. Prior to 1871, the U.S. government regularly entered into contracts with Native Americans, but the Indian Appropriations Act of March 3, 1871 (chap. 120, 16 Stat. 563) had accompanied a horseman (25 U.S.C. § 71) which effectively terminated the presidential convention by providing that no Indian nation or tribe may be recognized as an independent nation.
Tribe or power with which the United States may enter into contracts. After 1871, the federal government pursued similar contractual relations with Indian tribes through agreements, statutes, and implementing regulations.  In India, the subjects are divided into three lists: the Union, the State and at the same time. . . .