While the physical location of the Recourse Directorate has not changed, the mailing address for submitting paper SIMA/Trade appeals has. D14-1-3 serves as the prescription instrument for requests for re-determination under SIMA and was updated to reflect the new address:
https://www.cbsa-asfc.gc.ca/publications/dm-md/d14/d14-1-3-eng.html
Requests filed pursuant to subsection 58(1.1) of SIMA for a re-determination by the President of the CBSA, as well as notices of appeals made under section 61 of SIMA, must be addressed to the Director of Trade Appeals and Litigation, Recourse Directorate, and may be sent to:
Delivery by Canada Post
Trade Appeals and Litigation
Recourse Directorate
Canada Border Services Agency
2215 C Gladwin Cres
Ottawa, ON K1A 0L8
Delivery by Courier
Trade Appeals and Litigation
Recourse Directorate
Canada Border Services Agency
2215 C Gladwin Cres
Ottawa, ON K1B 4K9
Please note, the CBSA has advised that any requests for re-determination mailed to the old address were indeed re-routed to the new location.