Treaties can be designated by a number of names: international conventions, international agreements, alliances, final acts, charters, protocols, pacts, agreements and constitutions for international organizations. Normally, these different names have no legal meaning in international law (see the next section for the difference in US law). Contracts can be bilateral (two parties) or multilateral (between several parties) and a contract usually only binds the parties. An agreement „enters into force” if the conditions for entry into force set out in the agreement are met. Bilateral agreements usually enter into force when the two parties agree to be bound from a given date. A convention is the regulatory framework for parties that approve the Convention to solve a problem that affects more of the world.. . . .