Aircraft Registration Mark Size — CARs Standard 222
CARs Standard 222 s.4 · Federal — Canada
§The Law
CARs Standard 222 s.4 — CARs Standard 222 s.4
“Aircraft registration marks must be at least 30 centimetres (12 inches) in height for powered aircraft, and 50 centimetres for certain large aircraft.”
View official regulation text✓Plain English
Your C-XXXX registration letters must be at least 30cm (12") tall on a powered aircraft. This ensures ground observers can read them easily.
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Specific Requirements
30cm (12") minimum height — powered aircraft
50cm minimum for large transport aircraft
Ultralight aircraft different standards
Consistent size throughout all mark positions
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📚Sources & Authority
Every claim on this page is backed by official government legislation and verified industry sources. Last verified: March 2026.
🏛 Official Government Sources
Canadian Aviation Regulations (CARs) Part II
Justice Laws Canada · March 2026
CARs Part II covers aircraft identification and marking requirements including registration marks, sizing, and placement for Canadian-registered aircraft.
Transport Canada — Aircraft Registration
Transport Canada · March 2026
Official aircraft registration portal. Covers how to register, marking requirements, and the C- prefix system for Canadian aircraft.
RPAS (Drone) Registration — Transport Canada
Transport Canada · March 2026
Drone registration requirements for RPAS between 250g and 25kg. Registration number must be marked on the drone and visible at all times.
All sources are official government publications or recognized industry authorities. Links verified March 2026. If you find a broken link, let us know.
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- Regulation
- CARs Standard 222 s.4
- Jurisdiction
- 🇨🇦 Federal — Canada
- Category
- Aviation Law
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