According to regulations, how is an infant passenger defined?

The definition of an infant passenger, according to regulations, refers to a person under 2 years of age. This classification is important for several reasons, primarily concerning safety regulations, seating requirements, and the application of specific airline policies. Infants typically require special accommodations, such as a lap-held position for takeoff, landing, and during turbulence. Understanding this definition ensures that caregivers and airline personnel adhere to protocols designed to provide the safest travel conditions for young children.

While other age ranges are provided in the question, they do not align with the official definition, which specifically designates the age under 2 years as the cutoff for an infant. This distinction is critical in flight operations and passenger management, allowing both airlines and passengers to be aware of the necessary provisions for traveling with young children.