The signing of a contract is an act by which the state expresses its interest in the treaty and its intention to become a party. The state is not bound by the signature. However, it is obliged not to challenge the purpose and purpose of the treaty until it has specified its intention not to become a party to the treaty (see Article 18 of the Vienna Convention). The end of the preamble and the beginning of the agreement itself are often referred to by the words “agreed as follows.” Most of the time, a contract is developed and executed by the parties involved. A convention is developed and implemented by an international body such as the United Nations, an international maritime organization or an international labour organization. An essential part of treaty drafting is that the signing of a treaty implies recognition, that the other party is a sovereign state and that the agreement, considered to be under international law, is applicable. Therefore, nations can be very cautious when it comes to qualifying a treaty agreement. In the United States, for example, interstate agreements are pacts and agreements between states and the federal government or between government authorities are statements of intent. Ratification is an act by which the state expresses its final consent to the contractual commitment. In this case, the State party must respect and implement the provisions of the treaty. Treaties can be designated by a number of names: international conventions, international agreements, alliances, final acts, charters, declarations of intent, protocols, pacts, agreements and constitutions for international organizations. Normally, these different names have no legal value in international law (see the following section for the difference in U.S.
law). Contracts can be bilateral (two parties) or multilateral (between several parties) and a contract generally involves only the contracting parties. An agreement enters into force if the entry-into-force conditions set out in the agreement are met. Bilateral agreements generally come into force when both parties agree to be linked from a given date.