Who must the conductor advise of any restrictions placed on equipment being handled?

The conductor must advise the engineer and the train dispatcher of any restrictions placed on equipment being handled because both roles are directly involved in the operation of the train and the safety of the train's journey.

The engineer needs to be informed about restrictions to ensure safe management and operation of the train. This includes knowledge of any speed limitations, mechanical issues, or other operational constraints that may affect how the train is operated.

The train dispatcher, on the other hand, oversees the overall train movements and network safety. By informing the dispatcher, the conductor allows for any necessary adjustments in scheduling or routing and ensures that all departments are aligned on the operational status of the train.

Informing just the train crew without alerting the engineer and dispatcher would not provide comprehensive safety assurances or operational awareness necessary for managing the train effectively. Additionally, informing passengers or the maintenance crew about such restrictions typically falls outside the conductor's immediate responsibilities.