- 1
- Income derived by a resident of a Contracting State in respect of professional services or other activities of an independent character shall be taxable only in that State, unless:
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- a)he has a fixed base regularly available to him in the other Contracting State for the purpose of performing his activities; in that case, only so much of the income as is attributable to that fixed base may be taxed in that other Contracting State; or
- b)his stay in the other Contracting State is for a period or periods amounting to or exceeding in the aggregate of nine months in any twelve month period commencing or ending in the fiscal year concerned; in that case, only so much of the income as is derived from his activities performed in that other Contracting State may be taxed in that other State.
- 2
- The term “professional services” includes especially independent scientific, literary, artistic, educational or teaching activities as well as the independent activities of physicians, lawyers, engineers, architects, dentists and accountants.