Switzerland: double taxation agreement, Article 23: Non-discrimination
(1) Nationals of a Contracting State shall not be subjected in the other Contracting State to any taxation or any requirement connected therewith, which is other or more burdensome than the taxation and connected requirements to which nationals of that other State in the same circumstances are or may be subjected.
(2) The taxation on a permanent establishment which an enterprise of a Contracting State has in the other Contracting State shall not be less favourably levied in that other State than the taxation levied on enterprises of that other State carrying on the same activities.
(3) Nothing contained in this Article shall be construed as obliging a Contracting State to grant to individuals not resident in that State any of the personal allowances and reliefs which are granted to individuals so resident.
(4) Except where the provisions of paragraph (1) of Article 9, paragraph (4) or (7) of Article 11, paragraphs (4) or (5) of Article 12, or paragraphs (3) or (4) of Article 21 apply, interest, royalties and other disbursements paid by an enterprise of a Contracting State shall, for the purpose of determining the taxable profits of such enterprise, be deductible under the same conditions as if they had been paid to a resident of the first-mentioned State.
(5) Enterprises of a Contracting State, the capital of which is wholly or partly owned or controlled, directly or indirectly, by one or more residents of the other Contracting State, shall not be subjected in the first-mentioned State to any taxation or any requirement connected therewith which is other or more burdensome than the taxation and connected requirements to which other similar enterprises of the first-mentioned State are or may be subjected.
(6) The provisions of this Article shall apply to taxes of every kind and description.