1. Sovereignty over the territorial airspace — the foundational principle (Paris 1919's Article 1; Chicago 1944's Article 1's reaffirmation: complete and exclusive sovereignty above the territory — including the territorial sea's belt).
2. The freedom of flight in the airspace beyond — the high-seas' airspace: no state's sovereignty (Chicago's regime); the exclusive jurisdiction over the national aircraft (the flag state's law aloft).
3. The nationality-and-registration principle — the aircraft's legal person tethered to one state (Unit 2.3).
4. Non-discrimination-and-equal-opportunity (the Chicago Article 11-12 faces: the equal treatment of the foreign aircraft; the rules-of-the-air's uniformity).
5. The cabotage reservation — the domestic traffic's closed door (each state's own reserve).
6. The safety-and-security primacy (the SARPs' discipline; the security conventions' regime).