The only obligations on the shipper will be operational matters. For example, for the railway to deliver cars to the shipper, the shipper has to be there and ready to load those cars. The shipper would need to have a crew there.
If the shipper is asking for certain service elements in a service agreement, the bill says that the arbitrator can look at whether there are operational requirements that the shipper has to follow, and put those in the agreement as well.