First, the overarching duty — Page 473, Lesson 638

Let’s pick this up right where the obligations of States end, because that list flows straight into the practical side of aviation security. I want to walk you through the preventative security measures that Contracting States must put in place, and I’ll define every term as we go. First, the overarching duty. Each Contracting State — that’s any State that has signed and ratified the Chicago Convention — shall establish measures to prevent weapons, explosives, or any other dangerous devices from being introduced, by any means whatsoever, on board an aircraft engaged in international civil aviation. The key qualifier here is that these are objects which may be used to commit an act of unlawful interference, and whose carriage or bearing is not authorized. So the standard isn’t banning all weapons outright — it’s banning the unauthorized ones, and it’s the State’s job to build the system that keeps them off the aircraft. There’s a note attached to this standard, and it’s important. In applying it, special attention must be paid to the threat posed by explosive devices concealed in, or using, electric, electronic, or battery-operated items carried as hand baggage and/or in checked baggage. So think of a laptop, a phone, a power bank — these are the items the standard specifically flags, because they can hide or house an explosive device. That’s why you see security screening pay such close attention to electronics. Next, the protection of cargo, mail, and other goods. States must protect these by taking three specific security controls. The first is screening prior to being loaded onto the aircraft — the cargo has to be examined before it ever goes into the hold. The second is approval and security screening of Agents or known consignors. An Agent is a freight forwarder or handling company; a known consignor is a shipper who has been vetted and approved by the State as secure. Both have to be approved and screened themselves, because if the people handling the cargo aren’t trusted, the cargo isn’t trusted. The third control is access control — entry of only authorized personnel to the areas where cargo, mail, and other goods are held. So it’s a layered system: screen the goods, vet the people, and control who can physically get near them. Now, law enforcement officers. This is a slightly different rule, and note the wording — it says Contracting States should ensure, not shall. That’s a recommendation rather than a mandatory standard. The carriage of weapons on board aircraft by law enforcement officers and other authorized persons, acting in the performance of their duties, requires special authorization in accordance with the laws of the States involved. So an armed officer can’t just board with a weapon — there has to be specific authorization, and it has to comply with the laws of every State involved, not just one. Then there are the notification and approval requirements. The pilot-in-command is notified as to the number of armed persons and their seat location. So the captain knows exactly how many armed people are on board and where they’re sitting. Additionally, all en route States — that’s every State the aircraft will fly over — as well as the departure and destination States, and the aerodrome authorities, must approve the transit of armed security personnel. So before an armed officer can travel, you need approval from the States you’re leaving, the States you’re flying over, the State you’re landing in, and the airport authorities at each end. Let me tie this together. The whole structure is preventative. You screen the cargo, you vet the agents and consignors, you control access, you flag the electronics threat, and for armed law enforcement you require special authorization plus notification to the pilot and approval from every relevant State and aerodrome. Each measure is a layer, and together they’re designed to stop an act of unlawful interference before it can happen.