If a third class medical is issued on March 15, 2016, when will it expire for a person under 40?

For a third class medical certificate issued to a person under 40 years of age, it is valid for a period that lasts until the last day of the 60th month following the month of the examination. This means that if the medical was issued on March 15, 2016, it will remain valid until the last day of the 60th month after March 2016.

Breaking it down: The certificate was issued in March 2016, and counting 60 months from that date, you arrive at March 2021. The last day of that month is March 31, 2021. Therefore, the correct interpretation of the expiration date aligns with option B, which accurately reflects this regulation regarding the duration of validity for a third-class medical certificate for an individual under 40. This understanding is crucial for pilots to ensure they maintain their medical certification and remain compliant with FAA regulations.