Consent is also void if it is motivated by the fraudulent behaviour of another party or by the direct or indirect “corruption” of its representative by another party. The coercion of a representative or the state itself by the threat or use of force when used to obtain that state`s agreement on a contract is annulled. 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] Treaties and other international agreements are written agreements between sovereign states (or between states and international organizations) that are governed by international law. The United States concludes more than 200 treaties and other international agreements each year. In the United States, the term “treaty” has a different, more limited legal meaning than in international law. U.S. legislation distinguishes what it calls “treaties” from “executive agreements” that are either “executive agreements of Congress” or “single executive agreements.” Classes are all treatises of international law in the same way; they differ only in U.S. domestic law. 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. If the withdrawal of a State party is successful, its obligations under this treaty are deemed terminated and the withdrawal of part of a bilateral treaty terminates the treaty. When a state withdraws from a multilateral treaty, it remains in force among the other parties, unless it is interpreted differently, as has been agreed among the other States Parties. [Citation required] International courts and arbitrators are often called upon to resolve key disputes over interpretations of the contract. In order to determine its importance, these judicial bodies can examine for themselves the preparatory work for the negotiation and development of the treaty as well as the final contract signed. If a contract does not contain provisions for other agreements or measures, only the text of the treaty is legally binding.
In general, an amendment to the Treaty only commits the States that have ratified it and the agreements reached at review conferences, summits or meetings of the States Parties are not legally binding. The Charter of the United Nations is an example of a treaty that contains provisions for other binding agreements.