Per the "NSR Settlement Agreement" filed 7/20/21 as STB 30275, CSX states the following re: routing of CSX traffic over PAS via Rotterdam Jct (ie, the "Rotterdam Commitment"):
CSX agrees to interchange traffic to/from Ayer Industry Locations (as defined in the Ayer Switching Agreement), via Rotterdam for a transitional {{ [redacted]}} period from the date CSX consummates the Transaction (“Rotterdam commitment”), except to and from the following origin/terminating states and district: Florida, Georgia, Alabama, South Carolina, North Carolina, Virginia, the District of Columbia, Maryland, and, to the extent that the traffic originates or terminates on a CSX local station only, Connecticut, Rhode Island, and Massachusetts (the “Excepted States”). CSX may route via a PAS gateway other than Ayer any traffic originating or terminating in Connecticut, Rhode Island, and Massachusetts which does not originate or terminate at a CSX local station (“Non-local commitment”). Traffic to or from the Excepted States may be switched at CSX’s option through Barbers Station without prior or subsequent movement over CPF 312 subject to a switch charge of [redacted]
I infer the above to mean that given Ayer-bound grain comes via CSX interchange in the midwest (eg, BNSF, UP, CP, CN...), grain unit trains / carloads should operate via PAS once B&E is up and running. But given that Bow-bound coal is not contemplated by the Rotterdam Commitment, it would be routed on CSX Southern Route via Worcester. Similarly, Davisville-bound autos would also operate over the CSX Southern Route. OTOH, if NS were to originate the grain/coal/auto traffic to these destinations, it would operate over PAS.