When does enrollment in the Army Body Composition Program (ABCP) begin?

Enrollment in the Army Body Composition Program (ABCP) begins upon notification by the unit commander. This process underscores the authority that unit commanders have in managing soldier readiness and maintaining standards related to body composition. Commanders assess individual soldiers based on their adherence to the Army's weight and fitness standards, and upon determining a soldier's need for enrollment in the program, they formally notify the affected individual. This initiation process allows for tailored intervention and support while ensuring compliance with Army policies related to physical fitness and health.

The other options do not accurately reflect the procedural framework of the ABCP. For instance, the start of each training cycle or a specific day of the month doesn’t relate to individualized assessments necessary for enrollment. Additionally, while a physical assessment may play a role in evaluating body composition, it is the commander's notification that formally initiates enrollment in the ABCP.