What must be specified when a foul time request is made?

When making a foul time request, it is crucial to specify the control point or manual interlocking that will be occupied. This requirement ensures that all relevant personnel and systems are aware of the exact location where foul time will apply, thus minimizing the risk of accidents and ensuring the safety of all employees working in that area.

Identifying the specific control point or interlocking is important because it allows the dispatching and signal systems to effectively manage train movements and prevent conflicts. This clear communication creates a precise operational framework for maintaining safety during maintenance activities or other situations that may create fouling conditions on the track.

The other options, while potentially useful information in specific contexts, are not essential for the foul time request itself. For instance, departure time and destination may be considerations in other operational contexts but do not directly relate to the immediate need to specify fouling locations. Listing all active employees in the area is also not required in the foul time request, as the focus must remain on the operational safety concerns pertinent to the physical space involved.