(1) The business profits of an enterprise of a Contracting State shall be taxable only in that State unless the enterprise carries on or has carried on business in the other Contracting State through a permanent establishment situated therein. If the enterprise carries on or has carried on business as aforesaid, the business profits of the enterprise may be taxed in the other State but only so much of them as is attributable to that permanent establishment.
(2) Subject to the provisions of paragraph (3), where an enterprise of a Contracting State carries on or has carried on business in the other Contracting State through a permanent establishment situated therein, there shall in each Contracting State be attributed to that permanent establishment the business profits which it might be expected to make if it were a distinct and independent enterprise engaged in the same or similar activities under the same or similar conditions.
(3) In determining the business profits of a permanent establishment, there shall be allowed as deductions expenses that are incurred for the purposes of the permanent establishment, including a reasonable allocation of research and development expenses, interest, and other similar expenses and executive and general and administrative expenses, whether incurred in the State in which the permanent establishment is situated or elsewhere.
(4) No business profits shall be attributed to a permanent establishment by reason of the mere purchase by that permanent establishment of goods or merchandise for the enterprise.
(5) For the purposes of this convention, the business profits to be attributed to the permanent establishment shall include only the profits derived from the assets or activities of the permanent establishment and shall be determined by the same method year by year unless there is good and sufficient reason to the contrary.
(6) Nothing in this Article shall effect the application of any law of a Contracting State relating to the determination of the tax liability of a person in cases where the information available to the competent authority of that State is inadequate to determine the profits to be attributed to a permanent establishment, provided that, on the basis of the available information, the determination of the profits of the permanent establishment is consistent with the principles stated in this Article.
(7) For the purposes of the convention, the term "business profits" means income derived from any trade or business. It includes, for example, profits from manufacturing, mercantile, fishing, transportation, communication, or extractive activities, and from the furnishing of the personal services of another person, including the furnishing by a corporation of the personal services of its employees. It does not include income received by an individual for his performance of personal services either as an employee or in an independent capacity.
(8) Where business profits include items of income which are dealt with separately in other Articles of the convention, then the provisions of those Articles shall not be affected by the provisions of this Article.