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UNITED STATES MODEL TECHNICAL EXPLANATION ACCOMPANYING THE UNITED STATES MODEL INCOME TAX CONVENTION OF NOVEMBER 15, 2006

Article 3 provides general definitions and rules of interpretation applicable throughout

U.S. Income Tax Treaty — Technical Explanation -2006 · 2026-10-03 edition · updated 2026-10-04 · United States

the Convention. Certain other terms are defined in other articles of the Convention. For example, the term "resident of a Contracting State" is defined in Article 4 (Resident). The term "permanent establishment" is defined in Article 5 (Permanent Establishment). These definitions are used consistently throughout the Convention. Other terms, such as "dividends," "interest" and "royalties" are defined in specific articles for purposes only of those articles.

Paragraph 1

Paragraph 1 defines a number of basic terms used in the Convention. The introduction to paragraph 1 makes clear that these definitions apply for all purposes of the Convention, unless the context requires otherwise. This latter condition allows flexibility in the interpretation of the treaty in order to avoid results not intended by the treaty's negotiators.

Subparagraph 1(a) defines the term "person" to include an individual, a trust, a partnership, a company and any other body of persons. The definition is significant for a variety of reasons. For example, under Article 4, only a "person" can be a "resident" and therefore

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eligible for most benefits under the treaty. Also, all "persons" are eligible to claim relief under Article 25 (Mutual Agreement Procedure).

The term "company" is defined in subparagraph 1(b) as a body corporate or an entity treated as a body corporate for tax purposes in the state where it is organized. The definition refers to the law of the state in which an entity is organized in order to ensure that an entity that is treated as fiscally transparent in its country of residence will not get inappropriate benefits, such as the reduced withholding rate provided by subparagraph 2(b) of Article 10 (Dividends). It also ensures that the Limitation on Benefits provisions of Article 22 will be applied at the appropriate level.

The terms "enterprise of a Contracting State" and "enterprise of the other Contracting State" are defined in subparagraph 1(c) as an enterprise carried on by a resident of a Contracting State and an enterprise carried on by a resident of the other Contracting State. An enterprise of a Contracting State need not be carried on in that State. It may be carried on in the other Contracting State or a third state (e.g., a U.S. corporation doing all of its business in the other Contracting State would still be a U.S. enterprise).

Subparagraph 1(c) further provides that these terms also encompass an enterprise conducted through an entity (such as a partnership) that is treated as fiscally transparent in the Contracting State where the entity=s owner is resident. The definition makes this point explicitly to ensure that the purpose of the Convention is not thwarted by an overly technical application of the term “enterprise of a Contracting State” to activities carried on through partnerships and similar entities. In accordance with Article 4 (Resident), entities that are fiscally transparent in the country in which their owners are resident are not considered to be residents of a Contracting State (although income derived by such entities may be taxed as the income of a resident, if taxed in the hands of resident partners or other owners). It could be argued that an enterprise conducted by such an entity is not conducted by a resident of a Contracting State, and therefore would not benefit from provisions applicable to enterprises of a Contracting State. The definition is intended to make clear that an enterprise conducted by such an entity will be treated as carried on by a resident of a Contracting State to the extent its partners or other owners are residents. This approach is consistent with the Code, which under section 875 attributes a trade or business conducted by a partnership to its partners and a trade or business conducted by an estate or trust to its beneficiaries.

Subparagraph (d) defines the term “enterprise” as any activity or set of activities that constitutes the carrying on of a business. The term “business” is not defined, but subparagraph (e) provides that it includes the performance of professional services and other activities of an independent character. Both subparagraphs are identical to definitions recently added to the OECD Model in connection with the deletion of Article 14 (Independent Personal Services) from the OECD Model. The inclusion of the two definitions is intended to clarify that income from the performance of professional services or other activities of an independent character is dealt with under Article 7 (Business Profits) and not Article 21 (Other Income).

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Subparagraph 1(f) defines the term "international traffic." The term means any transport by a ship or aircraft except when such transport is solely between places within a Contracting State. This definition is applicable principally in the context of Article 8 (Shipping and Air Transport). The definition combines with paragraphs 2 and 3 of Article 8 to exempt from tax by the source State income from the rental of ships or aircraft that is earned both by lessors that are operators of ships and aircraft and by those lessors that are not (e.g., a bank or a container leasing company).

The exclusion from international traffic of transport solely between places within a Contracting State means, for example, that carriage of goods or passengers solely between New York and Chicago would not be treated as international traffic, whether carried by a U.S. or a foreign carrier. The substantive taxing rules of the Convention relating to the taxation of income from transport, principally Article 8 (Shipping and Air Transport), therefore, would not apply to income from such carriage. Thus, if the carrier engaged in internal U.S. traffic were a resident of the other Contracting State (assuming that were possible under U.S. law), the United States would not be required to exempt the income from that transport under Article 8. The income would, however, be treated as business profits under Article 7 (Business Profits), and therefore would be taxable in the United States only if attributable to a U.S. permanent establishment of the foreign carrier, and then only on a net basis. The gross basis U.S. tax imposed by section 887 would never apply under the circumstances described. If, however, goods or passengers are carried by a carrier resident in the other Contracting State from a non-U.S. port to, for example, New York, and some of the goods or passengers continue on to Chicago, the entire transport would be international traffic. This would be true if the international carrier transferred the goods at the U.S. port of entry from a ship to a land vehicle, from a ship to a lighter, or even if the overland portion of the trip in the United States was handled by an independent carrier under contract with the original international carrier, so long as both parts of the trip were reflected in original bills of lading. For this reason, the U.S. Model refers, in the definition of "international traffic," to "such transport" being solely between places in the other Contracting State, while the OECD Model refers to the ship or aircraft being operated solely between such places. The U.S. Model language is intended to make clear that, as in the above example, even if the goods are carried on a different aircraft for the internal portion of the international voyage than is used for the overseas portion of the trip, the definition applies to that internal portion as well as the external portion.

Finally, a "cruise to nowhere," i.e., a cruise beginning and ending in a port in the same Contracting State with no stops in a foreign port, would not constitute international traffic.

Subparagraph 1(g) designates the "competent authorities" for the other Contracting State and the United States. The U.S. competent authority is the Secretary of the Treasury or his delegate. The Secretary of the Treasury has delegated the competent authority function to the Commissioner of Internal Revenue, who in turn has delegated the authority to the Deputy Commissioner (International) LMSB. With respect to interpretative issues, the Deputy Commissioner (International) LMSB acts with the concurrence of the Associate Chief Counsel (International) of the Internal Revenue Service.

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The geographical scope of the Convention with respect to the other Contracting State is set out in subparagraph 1(h).

The geographical scope of the Convention with respect to the United States is set out in subparagraph 1(i). It encompasses the United States of America, including the states, the District of Columbia and the territorial sea of the United States. The term does not include Puerto Rico, the Virgin Islands, Guam or any other U.S. possession or territory. For certain purposes, the term "United States" includes the sea bed and subsoil of undersea areas adjacent to the territorial sea of the United States. This extension applies to the extent that the United States exercises sovereignty in accordance with international law for the purpose of natural resource exploration and exploitation of such areas. This extension of the definition applies, however, only if the person, property or activity to which the Convention is being applied is connected with such natural resource exploration or exploitation. Thus, it would not include any activity involving the sea floor of an area over which the United States exercised sovereignty for natural resource purposes if that activity was unrelated to the exploration and exploitation of natural resources. This result is consistent with the result that would be obtained under Section 638, which treats the continental shelf as part of the United States for purposes of natural resource exploration and exploitation.

The term "national," as it relates to the United States and to the other Contracting State, is defined in subparagraphs 1(j). This term is relevant for purposes of Articles 19 (Government Service) and 24 (Non-Discrimination). A national of one of the Contracting States is (1) an individual who is a citizen or national of that State, and (2) any legal person, partnership or association deriving its status, as such, from the law in force in the State where it is established.

Subparagraph (k) defines the term "pension fund" to include any person established in a Contracting State that is generally exempt from income taxation in that State and that is operated principally to provide pension or retirement benefits or to earn income for the benefit of one or more such arrangements. In the case of the United States, the term “pension fund” includes the following: a trust providing pension or retirement benefits under a Code section 401(a) qualified pension plan, profit sharing or stock bonus plan, a trust providing pension or retirement benefits under a Code section 403(b) plan, a trust that is an individual retirement account under Code section 408, a Roth individual retirement account under Code section 408A, or a simple retirement account under Code section 408(p), a trust providing pension or retirement benefits under a simplified employee pension plan under Code section 408(k), a trust described in section 457(g) providing pension or retirement benefits under a Code section 457(b) plan, and the Thrift Savings Fund (section 7701(j)). Section 401(k) plans and group trusts described in Revenue Ruling 81-100 and meeting the conditions of Revenue Ruling 2004-67 qualify as pension funds because they are covered by Code section 401(a).

Paragraph 2

Terms that are not defined in the Convention are dealt with in paragraph 2.

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Paragraph 2 provides that in the application of the Convention, any term used but not defined in the Convention will have the meaning that it has under the law of the Contracting State whose tax is being applied, unless the context requires otherwise, or the competent authorities have agreed on a different meaning pursuant to Article 25 (Mutual Agreement Procedure). If the term is defined under both the tax and non-tax laws of a Contracting State, the definition in the tax law will take precedence over the definition in the non-tax laws. Finally, there also may be cases where the tax laws of a State contain multiple definitions of the same term. In such a case, the definition used for purposes of the particular provision at issue, if any, should be used.

If the meaning of a term cannot be readily determined under the law of a Contracting State, or if there is a conflict in meaning under the laws of the two States that creates difficulties in the application of the Convention, the competent authorities, as indicated in paragraph 3(c)(iv) of Article 25 (Mutual Agreement Procedure), may establish a common meaning in order to prevent double taxation or to further any other purpose of the Convention. This common meaning need not conform to the meaning of the term under the laws of either Contracting State.

The reference in paragraph 2 to the internal law of a Contracting State means the law in effect at the time the treaty is being applied, not the law as in effect at the time the treaty was signed. The use of "ambulatory" definitions, however, may lead to results that are at variance with the intentions of the negotiators and of the Contracting States when the treaty was negotiated and ratified. The reference in both paragraphs 1 and 2 to the "context otherwise requir[ing]" a definition different from the treaty definition, in paragraph 1, or from the internal law definition of the Contracting State whose tax is being imposed, under paragraph 2, refers to a circumstance where the result intended by the Contracting States is different from the result that would obtain under either the paragraph 1 definition or the statutory definition. Thus, flexibility in defining terms is necessary and permitted.

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