I would expect this to run afoul of any investor-state dispute resolution agreements that Canada has signed with other countries (NAFTA, Canada/China have an IS

I would expect this to run afoul of any investor-state dispute resolution agreements that Canada has signed with other countries (NAFTA, Canada/China have an ISDS as well) - since it is a stamp-duty rather than an import duty. Typically those agreements require that investors be treated as locals once the asset is purchased. Edit - Since this is typically aimed at Chinese buyers instead of Americans, here's the link to the agreement Canada and China have: http://www.international.gc.ca/trade-agreements-accords-commerciaux/agr-acc/fipa-apie/china-text-chine.aspx?lang=eng http://www.international.gc.ca/trade-agreements-accords-comm... Important Text: 1. Each Contracting Party shall accord to investors of the other Contracting Party treatment no less favourable than that it accords, in like circumstances, to its own investors with respect to the expansion, management, conduct, operation and sale or other disposition of investments in its territory.