Treaties and other international agreements are written agreements between sovereign States (or between States and international organizations) that are subject to international law. The United States concludes more than 200 treaties and other international agreements each year. If a contract does not contain any provisions for other agreements or actions, only the text of the contract is legally binding. In general, an amendment to the treaty is binding only on States that have ratified it, and agreements reached at review conferences, summits or meetings of States parties are politically binding, but not legally binding. An example of a treaty that contains provisions for other binding agreements is the Charter of the United Nations. .