26 U.S.C. § 679: Foreign trusts having one or more United States beneficiaries

A United States person who directly or indirectly transfers property to a foreign trust (other than a trust described in section 6048(a)(3)(B)(ii)) shall be treated as the owner for his taxable year of the portion of such trust attributable to such property if for such year there is a United States beneficiary of any portion of such trust. To any transfer by reason of the death of the transferor. To any transfer of property to a trust in exchange for consideration of at least the fair market value of the transferred property. For purposes of the preceding sentence, consideration other than cash shall be taken into account at its fair market value. except as provided in regulations, any obligation of a person described in subparagraph (C), and to the extent provided in regulations, any obligation which is guaranteed by a person described in subparagraph (C). Principal payments by the trust on any obligation referred to in subparagraph (A) shall be taken into account on and after the date of the payment in determining the portion of the trust attributable to the property transferred. the trust, any grantor, owner, or beneficiary of the trust, and any person who is related (within the meaning of section 643(i)(2)(B)) to any grantor, owner, or beneficiary of the trust. If a nonresident alien individual has a residency starting date within 5 years after directly or indirectly transferring property to a foreign trust, this section and section 6048 shall be applied as if such individual transferred to such trust on the residency starting date an amount equal to the portion of such trust attributable to the property transferred by such individual to such trust in such transfer. For purposes of this section, undistributed net income for periods before such individual’s residency starting date shall be taken into account in determining the portion of the trust which is attributable to property transferred by such individual to such trust but shall not otherwise be taken into account. For purposes of this paragraph, an individual’s residency starting date is the residency starting date determined under section 7701(b)(2)(A). an individual who is a citizen or resident of the United States transferred property to a trust which was not a foreign trust, and such trust becomes a foreign trust while such individual is alive, subsection (a) applies to a trust for the transferor’s taxable year, and subsection (a) would have applied to the trust for his immediately preceding taxable year but for the fact that for such preceding taxable year there was no United States beneficiary for any portion of the trust, under the terms of the trust, no part of the income or corpus of the trust may be paid or accumulated during the taxable year to or for the benefit of a United States person, and if the trust were terminated at any time during the taxable year, no part of the income or corpus of such trust could be paid to or for the benefit of a United States person. in the case of a foreign corporation, such corporation is a controlled foreign corporation (as defined in section 957(a)), in the case of a foreign partnership, a United States person is a partner of such partnership, or in the case of a foreign trust or estate, such trust or estate has a United States beneficiary (within the meaning of paragraph (1)). A beneficiary shall not be treated as a United States person in applying this section with respect to any transfer of property to foreign trust if such beneficiary first became a United States person more than 5 years after the date of such transfer. the terms of the trust specifically identify the class of persons to whom such distributions may be made, and none of those persons are United States persons during the taxable year. For purposes of paragraph (1)(A), if any United States person who directly or indirectly transfers property to the trust is directly or indirectly involved in any agreement or understanding (whether written, oral, or otherwise) that may result in the income or corpus of the trust being paid or accumulated to or for the benefit of a United States person, such agreement or understanding shall be treated as a term of the trust. For purposes of this subsection, a loan of cash or marketable securities (or the use of any other trust property) directly or indirectly to or by any United States person (whether or not a beneficiary under the terms of the trust) shall be treated as paid or accumulated for the benefit of a United States person. The preceding sentence shall not apply to the extent that the United States person repays the loan at a market rate of interest (or pays the fair market value of the use of such property) within a reasonable period of time. submits such information to the Secretary as the Secretary may require with respect to such transfer, and demonstrates to the satisfaction of the Secretary that such trust satisfies the requirements of subparagraphs (A) and (B) of subsection (c)(1). The Secretary shall prescribe such regulations as may be necessary or appropriate to carry out the purposes of this section. foreign trusts created after May 21, 1974 , and transfers of property to foreign trusts after May 21, 1974 .”