....hmm....'nuff said'....Rook....really? There is a big difference between an airline positioning crew to operate aircraft, and having those same crew 'based' in a US port, operating OUT of that port and back TO that port at the end of duty. The INS and IRS in the USA will i'm sure be more interested in the issue than you purport. Just as an American can not be based in Vancouver, neither should an Canuck be allowed to be 'based' in the US. I know it may not be what you want to hear, but how do you justify blocking dozens of base slots from legit Americans who want them? And why would you think that those same Americans might eventually feel they need to make an issue of it with their local congressmen or senators? Eventually CX will have to resolve this, but they will probably mess it up in their usual short-shrift way.