Adopted and opened for signature, ratification and accession by General Assembly resolution 2200A (XXI) of 16 December 1966 and entred into force on 3 January 1976, in accordance with article 27.
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.