In addition, a law may be repealed after it has never come into force. [1] To understand the difference between the signing of a contract and the entry into force of a contract, there are two important concepts to know: the date of entry into force and the date of performance. Once adopted, treaties and their amendments may have to follow the official legal procedures of the Organisation, such as the United Nations, which they have sponsored, including signature, ratification and entry into force. . . .