What document is required for a Personnel Asset Inventory (PAI)?

The correct answer is the Change of Command document, as it is essential for conducting a Personnel Asset Inventory (PAI). When a change of command occurs, it typically involves a reassessment of personnel and resources within the unit. This document helps to ensure an accurate accounting of personnel assigned to the unit and is vital for the transition period, during which a new commander takes over responsibilities. A thorough PAI relies on this document to verify that all personnel are accounted for and to provide an updated status for the unit.

The other choices, while important in their contexts, do not have the same direct relevance to the PAI process. The unit readiness report focuses on the overall capability and preparedness of the unit rather than individual personnel accounting. The staff action memorandum generally deals with specific directives or actions rather than a comprehensive audit of personnel. The annual training plan outlines training objectives and schedules, but it does not address the immediate logistical needs of personnel inventory required during command transitions.