You will pre-clear US Customs in T2 and once you clear customs you will be in US territory within the terminal. The same is true for T1 where ACA also flys out of. When you fly back you will clear Canadian Customs in Pearson.
You will pre-clear US Customs in T2 and once you clear customs you will be in US territory within the terminal. The same is true for T1 where ACA also flys out of. When you fly back you will clear Canadian Customs in Pearson.
Just to clarify, after you clear US customs @ Pearson, you are still in Canadian territory and Canadian laws apply. USA laws do not apply. They had problems a few years ago with US Customs trying to apply USA law @ Pearson. This is why you'll now see Canadian police officers stationed by the US customs officers at the airport. They are there to protect Canadians.