As I understand it, Canada Customs has made their own interpretation of the criminal code. The loophole that exists that makes thumb studs and assisted openers legal has been re interpreted by Canadian Customs. It seems that by their logic, the thumb stud is attached to the blade, which is in turn attached to the handle, ergo, a thumb stud is a switchblade, because the opening device is on the handle. This is a Canadian Customs interpretation, and no modification has been made to the criminal code. This is a bigger problem, as it seems that Canada Customs is enforcing their interpretation of the Criminal Code. Such BS.