The text of the convention was finalized at a meeting of representatives of 80 countries in Washington, D.C., United States, on 3 March 1973. It was then open for signature until 31 December 1974. It entered into force after the 10th ratification by a signatory country, on 1 July 1975. Countries that signed the Convention become Parties by ratifying, accepting or approving it. By the end of 2003, all signatory countries had become Parties. States that were not signatories may become Parties by acceding to the convention. As of October 2016, the convention has 183 parties, including 182 states and the European Union.