Aircraft Nationality and Registration Marks — Page 64, Lesson 110

Let's start with the very foundation of this chapter. I want you to understand that every aircraft in the world has an identity, just like a person has a passport. The Paris Convention of 1919 established the rule that all aircraft must be registered and must carry two specific marks: a nationality mark and a registration mark. This is a legal requirement, not an option. Now, the modern rules come from the Chicago Convention. Specifically, Annex 7 of the Chicago Convention is the document that covers Aircraft Nationality and Registration Marks. Here's an important detail: Annex 7 contains only Standards, with no recommendations. In aviation law, a Standard is a mandatory requirement, whereas a recommendation is a suggested practice. So everything in Annex 7 is binding on the Contracting States. However, there is flexibility. An Authority—meaning the national aviation authority of a State—may temporarily exempt an aircraft from registration. A classic example is the test flying of a prototype. Similarly, an Authority may exempt an aircraft from carrying markings, such as for an historic aircraft or an ex-military aeroplane. So the rule is strict, but there are narrow, temporary exceptions. Now, let's talk about how States interact with ICAO on this. Annex 7 contains lists of Contracting States, and these lists show three possible situations. First, a State may have notified ICAO of differences that exist between its national regulations and the international ICAO standards in Annex 7. Second, a State may have notified ICAO that no differences exist. Third, a State may have given no information to ICAO on this subject. So ICAO keeps track of who complies, who deviates, and who hasn't said anything. Let's move to the markings themselves. The nationality and registration mark is a group of characters. Let me give you the example from the text: G-ABCD. Here, G is the nationality mark, and it always precedes the registration mark, which is ABCD. So the nationality mark comes first, always. There's a specific rule about hyphens. When the first character of the registration mark is the same type of character as the last character of the nationality mark, it must be preceded by a hyphen. In our example, G is a letter and A is a letter, so they are the same type of character, and that's why we write G-ABCD with a hyphen. If they were different types, the hyphen might not be required. Now, where does the nationality mark come from? It is selected from the series of nationality symbols included in the radio call signs allocated to the State of Registry by the International Telecommunications Union. The ITU is an agency of the United Nations. So the nationality mark isn't arbitrary—it's tied to the radio call sign system. The nationality mark must be notified by the State of Registry to ICAO. And here's the flexibility: it may consist of single letters, multiple letters, or a combination of letters and numbers. It may also include a symbol of the State. For example, Switzerland could include the Red Cross as part of its nationality mark. So to summarize what we have so far: every aircraft must be registered, must carry a nationality mark and a registration mark, the nationality mark always comes first, and it's derived from the ITU radio call sign allocation. The registration mark follows, and the hyphen rule applies when the character types match. Now, I want to point out that this chapter also covers Certification of Registration, Aircraft Markings, and Classification of Aircraft. We've just covered the introduction and the nationality and registration marks themselves. The next part of the text continues with the registration mark details, which we'll get into. But for now, make sure you're comfortable with the idea that the nationality mark is the State's identifier, and the registration mark is the individual aircraft's identifier within that State. Together, they form the complete identity of the aircraft.