Final answer:
The Selective Service System (SSS) requires waivers for individuals in the military who reach a certain age while on duty.
Step-by-step explanation:
The subject of this question is Selective Service System (SSS) and its role in requiring waivers for orders for individuals reaching a certain age while on duty. The question is specifically asking about individuals who will reach a certain age while on duty, indicating that they are already part of the military.
The Selective Service System is responsible for maintaining a database of potential military service members in the United States. When males turn 18, they are required to register with the Selective Service System within 30 days. This registration is important for possible future military service if the need arises.
In certain cases, individuals who reach a specific age while on duty may require a waiver for orders. This means that they need special permission or exceptions in order to continue their duty beyond that age. Waivers are typically considered based on factors such as the individual's skills, qualifications, and potential hardships they may face.