Students. other Contracting Party from tax on his remuneration for such teach- ing for such period. ARTICLE XIX A student or business apprentice from the territory of one of the Contracting Parties who is receiving full-time education or training in the territory of the other Contracting Party shall be exempted by such other Contracting Party from tax on payments made to him by persons within the territory of the former Contracting Party for the purposes of his maintenance, education or training. ARTICLE XX (1) The taxation authorities of the Contracting Parties shall ex- change such information (being information available under the respective taxation laws of the Contracting Parties) as is necessary for carrying out the provisions of the present Convention or for the prevention of fraud or the administration of statutory provisions against legal avoidance in relation to the taxes which are the subject of the present Convention. Any information so exchanged shall be treated as secret and shall not be disclosed to any person other than those concerned with the assessment and collection of the taxes which are the subject of the present Convention. No information shall be exchanged which would disclose any trade secret or trade process. (2) As used in this Article, the term "taxation authorities" means, in the case of the United States, the Commissioner of Internal Revenue or his authorized representative; in the case of the United Kingdom, the Commissioners of Inland Revenue or their authorized representa- tive; and, in the case of any territory to which the present Convention is extended under Article XXII, the competent authority for the administration in such territory of the taxes to which the present Convention applies. ARTICLE XXI (1) The nationals of one of the Contracting Parties shall not, while resident in the territory of the other Contracting Party, be subjected therein to other or more burdensome taxes than are the nationals of such other Contracting Party resident in its territory. (2) The term "nationals" as used in this Article means (a) in relation to the United Kingdom, all British subjects and British protected persons, from the United Kingdom or any territory with respect to which the present Conven- tion is applicable by reason of extension made by the United Kingdom under Article XXII; and (b) in relation to the United States, United States citizens, and all persons under the protection of the United States, from the United States or any territory to which the present Convention is applicable by reason of extension made by the United States under Article XXII; Exchange of infor- mation. " Taxation authori- ties. " Taxes on nationals of other Contracting Party. "National."' 1386 TREATIES [60 STAT.
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