The deduction is not limited to gifts for use within the United States, or to gifts to or for the use of domestic corporations, trusts, community chests, funds, or foundations, or fraternal societies, orders, or associations operating under the lodge system. An organization will not be considered to meet the requirements of subparagraph (2) of this paragraph, or of paragraph (b) (2) or (3) of this section, if such organization engages in any activity which would cause it to be classified as an "action" organization under paragraph (c)(3) of § 1.501(c)(3) -1 of this chapter (Income Tax Regulations). For the deductions for charitable and similar gifts made by a nonresident who was not a citizen of the United States at the time the gifts were made, see § 25.2522(b)-1 . See §§ 25.2522(c)-1 and 25.2522(c)-2 for rules relating to the disallowance of deductions to trusts and organizations which engage in certain prohibited transactions or whose governing instruments do not contain certain specified requirements.
For further limitations see § 25.2522(c)-1 , relating to gifts to trusts and organizations which have engaged in a prohibited transaction described in section 681(b)(2) or section 503(c).
26 C.F.R. §25.2522(a)-1