For which situation is a Child Restraint System (CRS) specifically required?

A Child Restraint System (CRS) is specifically required when traveling with infants or small children because it ensures their safety during air travel. The purpose of a CRS is to provide an appropriate and secure way to restrain young passengers, reducing the risk of injury in the event of turbulence or an emergency landing. Regulatory standards typically dictate the use of these systems for children who meet certain age, weight, or height criteria, thus prioritizing their safety in the aircraft environment.

In other scenarios, such as transporting pets or storing luggage, there are no specific requirements for a CRS. While safety measures are still important for these situations, they do not involve the same regulations that govern the transport of young children. Additionally, emergency situations in the cockpit pertain to operational safety and procedures aimed at the flight crew and not at child safety restraint systems.