I don't think there are any issues unique to either of these agreements, or arrangement. It is possible for somebody, first of all, to make a claim to be resident in two or more countries. That's probably not something they would generally be inclined to do. It's possible for two or more countries to assert resident status with respect to somebody. What tax treaties seek to do is to resolve the conflict because it's generally not much fun, from a tax perspective, to be subject to full residence tax by two or more jurisdictions. What would happen in those circumstances is that the treaty would seek to produce an answer where you would end up with only one country taxing you as a resident. But in terms of taxpayers trying themselves to assert residence in one jurisdiction or another, it is possible to successfully change residence, and if they take enough pains, they will be able to do that. However, it does require them to give up their home and other connections in order to achieve that.
On December 5th, 2016. See this statement in context.