ALTA Energy, a resident of Luxembourg, claimed an exemption from Canadian income tax under Article 13(5) of the Canada-Luxembourg Income Tax Treaty in respect of a large capital gain arising from the sale of shares of ALTA Canada, its wholly-owned Canadian subsidiary. At that time, Alta Canada carried on an unconventional shale oil business in the Duvernay shale oil formation situated in Northern Alberta. Alta Canada was granted the right to explore, drill and extract hydrocarbons from an area of the Duvernay formation designated under licenses granted by the government of Alberta. The Canadian tax authorities denied that the exemption applied and assessed ALTA Energy accordingly. Article 13(5) of the Canada-Luxembourg Tax Treaty is a distributive rule of last application. It applies only in the case where the capital gain is not otherwise taxable under paragraphs (1) to (4) of Article 13 of the Treaty. Article 13(4) is relevant to the outcome of this appeal. Under that provision, Canada has ...
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