Originally Posted by
Kumulani
Why would someone not be eligible due to their origin airport? Wouldn't someone flying MEX-DEN-YYZ have gone through TSA screening in DEN and thus be just as compliant with Canada's security standards as someone who started in DEN?
And then couldn't someone starting in MEX and wanting to bypass an extra screening in YYZ just do MEX-DEN and DEN-YYZ as separate tickets so they'd get OSS?
1) It depends if 'OSS' is marked on the boarding pass. If the previous carrier doesn't participate in the program, then there is no IT infrastructure to print 'OSS' on the downline boarding passes.
2) Definitely possible. It is not a foolproof system. As others mention, there is nothing stopping a PEK-YYZ passenger who is not OSS eligible from handing something off to a DEN-YYZ passenger who is OSS eligible on the way to the Customs Hall.