How long is a class 3 medical valid for if the individual is under 40 years of age?

The validity of a Class 3 medical certificate is determined by the age of the applicant at the time of issuance. For individuals who are under 40 years of age, the certificate is valid for two years. This duration reflects the medical standards set by aviation authorities to ensure that pilots are fit to fly and maintain their health over a reasonable period without requiring frequent re-examination.

For those over 40, the validity decreases to one year due to the increased likelihood of health issues as age advances. Meanwhile, the other durations provided in the choices, like six months and three years, do not align with regulatory standards for medical certifications in aviation and do not apply to the typical duration of a Class 3 medical certificate.