Which action is required when limits have been reported clear?

When limits have been reported clear, writing "Void" on each copy of the Authority form is a necessary action. This step is essential to ensure clarity and prevent any potential confusion or misuse of the authority granted for that specific stretch of track. Declaring the authority void confirms that the previously issued clearance for operation is no longer valid, allowing for proper management of train movements within the affected limits.

This action serves to maintain safety protocols and communication integrity among crew members and dispatchers. By marking the authority as void, all parties are alerted to the change in status and can adjust their plans accordingly, thus emphasizing the importance of clear documentation in railroad operations.