Adopted and opened for signature, ratification and accession by General Assembly resolution 2200A (XXI) of 16 December 1966 and entred into force 23 March 1976, in accordance with Article 49.
Adopted and opened for signature, ratification and accession by General Assembly resolution 44/25 of 20 November 1989 Entry into force 2 September 1990, in accordance with article 49.