What must be communicated when command is transferred?

When command is transferred, the effective time and date of the transfer must be communicated clearly. This is essential for maintaining a seamless flow of information and operations, ensuring that all personnel are aware of who is in command and when that authority takes effect. This clarity helps prevent confusion and ensures that the incoming commander can take immediate responsibility for the situation and any decisions that need to be made.

Effective command transfer is a critical component of the Incident Command System (ICS), as it allows for continuity in leadership during an incident. Without this clear communication of the effective time and date, responders may not be certain when the new commander's instructions or strategies should be put into action, which could lead to inefficiencies or conflicts in decision-making.

Additionally, while the other options may seem relevant to a command transfer, they focus on additional context rather than the immediate necessity of establishing when the transfer takes place, which is paramount to ensuring operational integrity and effectiveness. Communicating the effective time and date takes precedence to ensure all team members are aligned under the new leadership.