16 Security properties l The primary security property can be stated as follows:  P1 : Passengers, crew, ground personnel and the general public must be safeguarded against acts of unlawful interference (article 2.1.1, 2nd chapter of Annex 17) l Set of preventive measures to achieve this goal (article 4.1, 4th chapter of Annex 17)  Each Contracting State shall establish measures to prevent weapons, explosives or any dangerous devices which may be used to commit an act of unlawful interference, the carriage or bearing of which is not authorized, from being introduced, by any means whatsoever, on board an aircraft engaged in international civil aviation.
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