26 CFR §25.2523(i)-1 — (i)-1 Disallowance of marital deduction when spouse is not a United States citizen.

1. (a)In general. Subject to § 20.2056A-1(c) of this chapter, section 2523(i)(1) disallows the marital deduction if the spouse of the donor is not a citizen of the United States at the time of the gift. If the spouse of the donor is a citizen of the United States at the time of the gift, the gift tax marital deduction under section 2523(a) is allowed regardless of whether the donor is a citizen or resident of the United States at the time of the gift, subject to the otherwise applicable rules of section 2523.
2. (b)Exception for certain joint and survivor annuities. Paragraph (a) does not apply to disallow the marital deduction with respect to any transfer resulting in the acquisition of rights by a noncitizen spouse under a joint and survivor annuity described in section 2523(f)(6).
3. (c)Increased annual exclusion
   1. (1)In general. In the case of gifts made from a donor to the donor's spouse for which a marital deduction is not allowable under this section, if the gift otherwise qualifies for the gift tax annual exclusion under section 2503(b), the amount of the annual exclusion under section 2503(b) is $100,000 in lieu of $10,000. However, in the case of gifts made after June 29, 1989, in order for the increased annual exclusion to apply, the gift in excess of the otherwise applicable annual exclusion under section 2503(b) must be in a form that qualifies for the marital deduction but for the disallowance provision of section 2523(i)(1). See paragraph (d), Example 4, of this section.
   2. (2)Status of donor. The $100,000 annual exclusion for gifts to a noncitizen spouse is available regardless of the status of the donor. Accordingly, it is immaterial whether the donor is a citizen, resident or a nonresident not a citizen of the United States, as long as the spouse of the donor is not a citizen of the United States at the time of the gift and the conditions for allowance of the increased annual exclusion have been satisfied. See § 25.2503-2(f).
4. (d)Examples. The principles outlined in this section are illustrated in the following examples. Assume in each of the examples that the donee, S, is D's spouse and is not a United States citizen at the time of the gift.