What is the maximum number of hours soldiers can perform extra duty under UCMJ before lights out?

The maximum number of hours soldiers can perform extra duty under the Uniform Code of Military Justice (UCMJ) before lights out is established to ensure that service members have adequate time to rest and recover after their duties. The correct choice, which states that extra duty must be completed by 2130, reflects the Army’s commitment to maintaining the welfare and readiness of its personnel.

This time is typically set to allow soldiers to unwind and prepare for the next day's responsibilities—promoting a balance between duty and rest. Having this cutoff ensures that while discipline is maintained, soldiers are not overextended to the point that it adversely affects their performance, morale, or well-being during their off-duty time. The other time options exceed the established limit, which is designed to uphold these important considerations.