Elie Roth, Tim Youdan, Chris Anderson, Kim Brown, "Taxation of Trusts Resident in Canada", Chapter 3 of Canadian Taxation of Trusts, (Canadian Tax Foundation), 2016.
Treaty relief from residency requirement in 70(6) – but “will” requirement (p. 171)
Subsection 70(6) applies to a transfer to a taxpayers spouse only when the taxpayer and the spouse were resident in Canada immediately before the taxpayer's death. If the property is to be transferred or distributed to a spousal trust created under the taxpayers will, subsection 70(6) requires that the taxpayer be resident in Canada immediately before death, and the trust must be resident in Canada immediately after the property vests in the trust. Article XXIX B(5) of the Canada-US tax treaty provides some relief from this requirement for individuals who are residents of the United States immediately before death. It deems a US resident individual and her spouse to be residents of Canada for the purposes of subsection 70(6). In addition, a spousal trust with US-resident trustees that would otherwise qualify for rollover treatment under subsection 70(6) may apply for competent authority relief so that it is deemed to be resident in Canada for the purposes of subsection 70(6). Article XXIX B(5) still requires that the transfer of property to the spousal trust be made under a will. This can raise practical difficulties because US individuals often use an inter vivos trust to reduce or defer US estate tax. A transfer made under the terms of such a trust does not qualify for competent authority relief under article XXIX B(5) because the transfer is not made under a deceased person's will. [F.n. 161…2009-094591117]