Chapter 4 also addresses special categories + weapons + in-flight security. 4.5 Measures Relating to Special Categories - each State shall establish appropriate special security controls for: diplomatic persons + State officials + escorted criminals + deportees + extradition + asylum seekers + unaccompanied minors + reduced mobility passengers + medical + animals; diplomatic immunity considerations + Vienna Convention; State aircraft. 4.6 Measures Relating to Weapons - prohibited articles list per ICAO Doc 8973 (firearms + explosives + incendiary + chemical + biological + nuclear + radiological + electroshock + cutting + sharp + clubs + tools + flammable); weapons carried by law enforcement + State officials only with prior notification + authorisation + State arrangements + secure container + ammunition; sky marshal arrangements; CBRN material screening + customs cooperation. 4.7 In-Flight Security Officers (IFSO / Air Marshal / Sky Marshal) - each State may choose to deploy IFSOs on its aircraft; covert + armed + trained + coordinated with cabin crew + flight crew + secure cockpit access procedures + arrest authority + sovereign immunity + bilateral arrangements with destination + transit States; weapons certification + custody during ground operations. 4.8 Flight Crew Compartment (Cockpit) Door - cockpit door of large transport aircraft shall be capable of being locked + unlocked + reinforced against forcible intrusion (after 9/11 introduced) + secondary barrier (US Boeing 737-800 series voluntary) + intrusion-resistant door per FAR Part 121.581 + EASA CS-25 + ICAO Annex 6 Part I attachment. Cockpit access procedures + cabin crew + flight crew coordination + emergency egress + medical event + crew compartment visibility. Coordinates with EU 2015/1998 + FAA Federal Air Marshal Service + IATA In-flight Security. ICAO Annex 17 Chap 4 + Special Categories + Weapons + IFSO + Cockpit Door applies.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.