Originally Posted by
airoli
There is a trial in YYZ with AC which allows bags from certain inbound intl. flights to be transfered directly to domestic connections. AFAIK, this trial has not been extended to YUL yet. And it definitely hasn't been extended to LX.
The trial with AC has been extended to YUL in the form of OSS, but it definitely has not been extended to LX. If one has an originating flight with an airline besides AC (UA and LX included) and connects to AC, this One-Stop Security Measure does NOT apply.