# Aircraft Identification Mark Placement: Annex 7 Wing, Fuselage, and Tail Rules

> Learn Annex 7 requirements for placing nationality and registration marks on wings, fuselage, and tail surfaces for clear aircraft identification.

- **Subject:** 010 — Air Law
- **Section:** 010-02 — Airworthiness of Aircraft, Aircraft Nationality and Registration Marks
- **Topic code:** 010-02-04
- **Last reviewed:** 2026-03-27
- **Author:** Pablo Asensio Martínez
- **HTML version:** https://pilotsyllabus.com/en/air-law/airworthiness-of-aircraft-aircraft-nationality-and-registration-marks/nationality-marks-common-marks-and-registration-marks/

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Annex 7 specifies where identification marks must be placed on heavier-than-air aircraft (aeroplanes, helicopters, etc.) to ensure their visibility.

## Location on Heavier-than-Air Aircraft

### Wings
*   Marks must appear **once** on the **lower surface** of the wing structure.
*   They shall be located on the **left half** of the lower surface unless they extend across the whole of the lower surface.
*   They shall be equidistant from the leading and trailing edges as far as possible.
*   The tops of the letters and numbers shall be toward the **leading edge** of the wing (**4.3.1**).

### Fuselage and Tail
Marks must appear in one of the following locations (**4.3.2**):
1.  **Fuselage:** On each side of the fuselage (or equivalent structure) **between the wings and the tail surface**.
2.  **Vertical Tail Surfaces:**
    *   If there is a single vertical surface: On **both sides**.
    *   If there are multiple vertical surfaces: On the **outboard sides** of the outer surfaces.

### Special Cases
If an aircraft does not possess the corresponding parts mentioned above, the marks shall appear in a manner such that the aircraft can be identified readily (**4.3.3**).

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