What is the minimum age for aircraft to qualify for reduced registration mark sizes?

The minimum age for aircraft to qualify for reduced registration mark sizes is indeed 30 years. This regulation is in place to acknowledge the historical significance and heritage of older aircraft, allowing them to maintain a distinct identity with smaller registration markings. The 30-year threshold ensures that only aircraft that have stood the test of time and are likely to be classic or vintage are eligible for this reduced marking size, reflecting their status and the intent to preserve aviation history.

Aircraft younger than this age continue to use standard registration mark sizes so that they are easily identifiable and adhere to more contemporary standards, which helps in operational safety and regulation compliance.