26 CFR §1.684-2

1. (a)In general. A transfer means a direct, indirect, or constructive transfer.
2. (b)Indirect transfers—(1) In general. Section 1.679-3(c) shall apply to determine if a transfer to a foreign trust or foreign estate, by any person, is treated as an indirect transfer by a U.S. person to the foreign trust or foreign estate.
   1. (2)Examples. The following examples illustrate the rules of this paragraph (b). In all examples, A is a U.S. citizen, FT is a foreign trust, and I is A's uncle, who is a nonresident alien. The examples are as follows:
3. (c)Constructive transfers. Section 1.679-3(d) shall apply to determine if a transfer to a foreign trust or foreign estate is treated as a constructive transfer by a U.S. person to the foreign trust or foreign estate.
4. (d)Transfers by certain trusts—(1) In general. If any portion of a trust is treated as owned by a U.S. person, a transfer of property from that portion of the trust to a foreign trust is treated as a transfer from the owner of that portion to the foreign trust.
   1. (2)Examples. The following examples illustrate the rules of this paragraph (d). In all examples, A is a U.S. person, DT is a domestic trust, and FT is a foreign trust. The examples are as follows:
5. (e)Deemed transfers when foreign trust no longer treated as owned by a U.S. person—(1) In general. If any portion of a foreign trust is treated as owned by a U.S. person under subpart E of part I of subchapter J, chapter 1 of the Internal Revenue Code, and such portion ceases to be treated as owned by that person under such subpart (other than by reason of an actual transfer of property from the trust to which § 1.684-2(d) applies), the U.S. person shall be treated as having transferred, immediately before (but on the same date that) the trust is no longer treated as owned by that U.S. person, the assets of such portion to a foreign trust.
   1. (2)Examples. The following examples illustrate the rules of this paragraph (e). In all examples, A is a U.S. citizen and FT is a foreign trust. The examples are as follows:
6. (f)Transfers to entities owned by a foreign trust. Section 1.679-3(f) provides rules that apply with respect to transfers of property by a U.S. person to an entity in which a foreign trust holds an ownership interest.