Under what circumstances can a property book be adjusted?

The ability to adjust a property book is primarily linked to changes in the assets that a unit manages. A change in equipment or the receipt of new supplies necessitates an update to the property book to accurately reflect the current inventory. This is an essential practice in maintaining accountability and ensuring that the property book represents the actual assets available to the unit at any given time.

In contrast, the other options do not directly pertain to reasons for adjusting a property book. For instance, a shortage of personnel may affect operations but does not impact the physical assets listed. Similarly, while deactivation of a unit may involve inventory management changes, it is not a direct cause for routine adjustments to the property book in the same context as receiving new supplies or equipment. Lastly, high inventory levels do not automatically require an adjustment, as the property book is concerned with record accuracy rather than inventory quantities at a glance.