Who is exempt from wearing a seat belt in an aircraft?

The rationale for this answer stems from regulations that allow for certain exemptions regarding seat belt use in aircraft. Specifically, a child under the age of 2 can be held in an adult's lap, which is permissible during flight operations. This reflects safety considerations while also accommodating the practicalities of traveling with very young children.

In this context, it is essential to understand that the exemption for a child under the age of 2 held by an adult recognizes the unique circumstances that come with very young passengers, while the adult is still secured with a seat belt.

Regulations are more stringent regarding seat belt wear for older children and adults, as they are typically required to be secured by their own seat belt during flight to enhance safety for all occupants. Therefore, understanding the specific exemptions helps recognize why the answer aligns with existing aviation safety guidelines.