"I've heard of storage in transit for grain, but milling in transit??
Wouldn't the transformation of bulk grain into bags of flour involve
an entirely new tariff?"
 
It would always be that way, once the shipment leaves the transit point, the inbound bill(s) would be surrendered and the freight paid credited to the thru rate for the "new commodity" from the original origin.
 
It could get complicated as you may be dealing with an outbound shipment that comprised product or tonnages from multiple origins into the transit station. I believe I saw some bills from five origins credited on one outbound bill. There were also time limits involved.
 
Ross McLeod Calgary

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