Originally Posted by
FlyingHoustonian
Many thanks for the update. 13 days ago I was specifically told YYZ does not allow sterile transfers by the CBSA. So this is a VERY recent change or is the CBSA misinformed?
YYZ does not allow a sterile transfer, except in the case of Domestic to Domestic and Domestic to International.
For T1:
Intl (incl US) - intl - CBSA check, along with potentially a security check depending on country of departure and airline
D/I to US - Security and CBP