HomeTransportation Status Lists ...06. Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation, done at Montreal September 23, 1971 hide 06. Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation, done at Montreal September 23, 1971 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force January 26, 1973. In accordance with Article 15, paragraph 3, the Convention entered into force thirty days following the date of the deposit of instruments of ratification by ten States signatory to this Convention which participated in the Montreal Conference. In accordance with Article 15, paragraph 4, for other States, this Convention shall enter into force on the date of entry into force of this Convention in accordance with Article 15, paragraph 3, or thirty days following the date of deposit of their instruments of ratification or accession, whichever is later. Download Status List [247 KB] Tags Multilateral Transportation Treaties