Appeals to all States that have not yet done so to consider becoming parties to the International Convention against the Taking of Hostages, the Convention on 1hc Prevention and Punishment of Crimes against Internationally Protected Persons, including Diplomatic Agents, the Convention for the Suppression of Unlawful Acts against the Safety of Civil Aviation, the Con- \Cntion for the Suppression of Unlawful Seizure of Aircraft and othcr relevant conventions;