generate questions: After their adoption, treaties as well as their amendments have to follow the official legal procedures of the United Nations, as applied by the Office of Legal Affairs, including signature, ratification and entry into force.
Treaties and their amendments must follow the official legal procedures of what body after their adoption? {sep_token} Which office of the United Nations is in charge of applying its official legal procedures? {sep_token} When must all treaties and their amendments follow the official legal procedures of the United Nations? {sep_token} In addition to signature and ratification, what legal procedure of the United Nations must all treaties follow after their adoption? {sep_token} What are three official legal procedures of the United Nations that all treaties must follow after their adoption? {sep_token}