31 C.F.R. § 594.409
Unless specifically authorized by the Office of Foreign Assets Control pursuant to this part, no charitable contribution or donation of funds, goods, services, or technology, including contributions or donations to relieve human suffering, such as food, clothing, or medicine, may be made by, to, or for the benefit of, or received from, any person whose property and interests in property are blocked pursuant to § 594.201(a) . For the purposes of this part, a contribution or donation is made by, to, or for the benefit of, or received from, any person whose property and interests in property are blocked pursuant to § 594.201(a) if made by, to, or in the name of, or received from or in the name of, such a person; if made by, to, or in the name of, or received from or in the name of, an entity or individual acting for or on behalf of, or owned or controlled by, such a person; or if made in an attempt to violate, to evade, or to avoid the bar on the provision of contributions or donations by, to, or for the benefit of such a person, or the receipt of contributions or donations from any such person.
31 C.F.R. §594.409