ADVOKS GLOBAL · KENYA
The Civil Aviation (Aircraft Nationality and Registration Marks) Regulations, 2025
15. Measurement of marks
Edition: 2026-03-03 · In force
15. Measurement of marks
(1)A person shall not operate an aircraft unless the aircraft is marked with letters and numbers of equal height for each separate group of marks.(2)The width of each character except the letter I and the number ‘1’) and the length of a hyphen shall be two-thirds the height of a letter or number.(3)The characters and hyphens shall be formed by solid lines and shall be of color contrasting clearly with the background, and thickness of the lines shall be one-sixth of the height of a character.(4)Each letter, or number, shall be separated from a letter, a number or hyphen, which precedes or follows it, by a space not less than one quarter of the width of a character (except the letter I and the number ‘1’).(5)In the case of lighter-than-air aircraft, other than unmanned free balloons, the height of the marks shall be at least 50 centimeters.(6)Where a lighter than air aircraft does not possess parts of sufficient size to accommodate the mark described in subregulation 5, the measurements of the marks shall be determined by the Authority taking into account of the need for the aircraft to be identified.(7)The marks on a balloon and unmanned free balloon shall be vertical and shall be at least 50 centimeters.(8)In case of heavier-than-air aircraft—(a)the wing marks shall be at least 50 centimeters in height;(b)the marks on the fuselage or equivalent structure shall be at least 30 centimeters in height without visually interfering with the outlines of the fuselage or equivalent structure;(c)the marks on the vertical tail surface marks shall be at least 30 centimeters in height with a clearance of 5 centimeters from leading and trailing edge of the tail surface; and(d)if the aircraft does not possess parts corresponding to those mentioned in marks are too small to accommodate in subregulation 8 (a), (b) and (c) or if the parts are too small to accommodate the marks, the measurements of the marks shall be determined by the Authority taking into account the need for the aircraft to be identified readily.(9)In the case of rotorcraft—(a)the marks shall be at least 30 centimeters in height, or (b) if the surface area of that part of the rotorcraft on which the marks are to be located is insufficient to enable compliance with paragraph (a);(b)the measurements of the marks shall be determined by the Authority taking into account the need for the aircraft to be identified readily;(c)as high as possible; or(d)in either case the mark shall leave a clearance of 5 centimeters from the edge of that part of the rotorcraft on which the marks are located and must not interfere with the outlines of the rotorcraft.(10)The marks shall be vertical or sloping at the same angle being an angle of no more than 30 degrees to the vertical axis.(11)The Authority may allow special cases for size and locations of nationality and registrations marks—(a)if either one of the surfaces authorised for displaying required marks is large enough for display of marks meeting the size requirements of this section and the other is not, the full-size marks shall be placed on the larger surface;(b)if neither surface is large enough for full-size marks, the Authority may approve marks as large as practicable for display on the larger of the two surfaces;(c)if, because of the aircraft configuration, it is not possible to mark the aircraft in accordance with this part, the owner may apply to the Authority for approval of location and size.