The taxable estate of a nonresident who was not a citizen of the United States at the time of his death is determined by adding the value of that part of his gross estate which, at the time of his death, is situated in the United States and, in the case of an estate to which section 2107 (relating to expatriation to avoid tax) applies, any amounts includible in his gross estate under section 2107(b), and then subtracting from the sum thereof the total amount of the following deductions:

The deductions allowed in the case of estates of decedents who were citizens or residents of the United States under sections 2053 and 2054 (see §§ 20.2053-1 through 20.2053-9 and § 20.2054-1) for expenses, indebtedness and taxes, and for losses, to the extent provided in § 20.2106-2.

A deduction computed in the same manner as the one allowed under section 2055 (see §§ 20.2055-1 through 20.2055-5) for charitable, etc., transfers, except—

That the deduction is allowed only for transfers to corporations and associations created or organized in the United States, and to trustees for use within the United States, and

That the provisions contained in paragraph (c)(2) of § 20.2055-2 relating to termination of a power to consume are not applicable.

Subject to the special rules set forth at § 20.2056A-1(c), the amount which would be deductible with respect to property situated in the United States at the time of the decedent's death under the principles of section 2056. Thus, if the surviving spouse of the decedent is a citizen of the United States at the time of the decedent's death, a marital deduction is allowed with respect to the estate of the decedent if all other applicable requirements of section 2056 are satisfied. If the surviving spouse of the decedent is not a citizen of the United States at the time of the decedent's death, the provisions of section 2056, including specifically the provisions of section 2056(d) and (unless section 2056(d)(4) applies) the provisions of section 2056A (QDOTs) must be satisfied.

Section 2106(b) provides that no deduction is allowed under paragraph (a) (1) or (2) of this section unless the executor discloses in the estate tax return the value of that part of the gross estate not situated in the United States. See § 20.2105-1. Such part must be valued as of the date of the decedent's death, or if the alternate valuation method under section 2032 is elected, as of the applicable valuation date.