“2.1 Nationality and registration marks on aircraft shall consist of a group of capital letters or numbers or combinations thereof. Except as provided in paragraph (h) of this part, the nationality and registration marks must be of equal height and on— (1) Fixed-wing aircraft, must be at least 12 inches high. The markings must be displayed on either the vertical tail surfaces or the sides of the fuselage. The Nationality and Registration marks shall be painted on the aircraft or shall be affixed thereto by any other means ensuring a similar degree of permanence. The complete regulatory requirement for identification and marking of a U.S.-registered aircraft can be found in Title 14 of the Code of Federal Regulations (14 CFR), Part 45, Identification and Registration Marking. Display of Nationality and Registration Marks. If the first character of the registration mark is a … Subpart B — Aircraft Registration and Certificate of Registration 47.51 Requirement for aircraft registration and certificate (a) Except as provided in Part 91, paragraph (c) and rule 47.53(a)(3), the person lawfully entitled to the possession of an aircraft for 28 days or longer must if the aircraft … registered aircraft unless that aircraft displays nationality and registration marks in accordance with the requirements of this section and Secs. A hyphen must be placed between the nationality and registration marks. “Every aircraft engaged in international air navigation shall bear its appropriate nationality and registration marks.” As the ICAO governs civil aviation and air travel as we know it, all airlines must abide by the rules set out by the organization in order to fly commercially between member states. (b) Unless otherwise authorized by the Administrator, no person may place on any aircraft a design, mark, or symbol that modifies or confuses the nationality and registration marks. 2.2 The nationality mark, which shall be placed before the registration mark, shall consist of the letters OY. §45.25 b) Paragraph 1(5) of the Schedule says that the nationality and registration marks must be displayed to the best advantage taking into consideration the constructional features of the aircraft; and must always be kept clean and visible. (h) After March 7, 1988, each operator of an aircraft penetrating an ADIZ or DEWIZ must display on that aircraft temporary or permanent nationality and registration marks at least 12 inches high. The marks shall be kept clean and visible at all times. The marks required by this part for fixed-wing aircraft must have the same height, width, thickness, and spacing on both sides of the aircraft. 45.23 through 45.33. Registration marks should be placed to the points of the listed aircrafts: For airships: Registration marks should be placed to the airframe or in the flight control area. For general aircrafts the nationality and registration marks must be painted on the aircraft or affixed permanently and kept visible and clear. particular registration letters, nor adjacent to the nationality and registration marks. (c) Aircraft nationality and registration marks must - (1) Except as provided in paragraph (d) of this section, be painted on the aircraft or affixed by any other means insuring a similar degree of permanence; (2) Have no ornamentation; (3) Contrast in color with the background; and (4) Be legible. Issue 01/Rev 00 CAD 7 – Aircraft Nationality and Registration Marks 4-1 4 Location of Nationality and Registration Marks 4.1 General 4.1.1 The nationality and registration marks shall be painted on the aircraft or shall be affixed by any other means ensuring a similar degree of permanence in a manner acceptable to the CAAM. (b) Height. AC 45-01(2.1): Nationality and Registration Marks 5 March 2015 9.4 Any special marking rules in place regarding amateur-built aircraft, previously specified in CAO 101.28 shall, at the time of introduction of the new legislation, continue.