What information must be read and understood during revisions?

Understanding changed information during revisions is crucial because it ensures that all personnel are aware of any updates or modifications that might affect flight operations, safety protocols, or passenger handling. Changes can include alterations in flight schedules, regulations, procedures, or any other critical operational aspects. By being aware of these updates, employees can adapt their actions and decision-making processes accordingly, which enhances safety and efficiency within the operation.

While other options provide valuable information in specific contexts, they are often fixed or periodic updates rather than items that constantly require revision. Flight schedules change, but those updates reflect changed information; passenger lists and weather reports serve specific purposes but do not encompass the broader implications that changed information entails. Therefore, focusing on changed information is essential for maintaining up-to-date awareness and operational readiness.