31 CFR §584.201

1. (a)All property and interests in property that are in the United States, that come within the United States, or that are or come within the possession or control of any United States person of the following persons are blocked and may not be transferred, paid, exported, withdrawn, or otherwise dealt in: Any person who the Secretary of the Treasury, in consultation with the Secretary of State, determines:
   1. (1)Is responsible for the detention, abuse, or death of Sergei Magnitsky, participated in efforts to conceal the legal liability for the detention, abuse, or death of Sergei Magnitsky, financially benefitted from the detention, abuse, or death of Sergei Magnitsky, or was involved in the criminal conspiracy uncovered by Sergei Magnitsky;
   2. (2)Is responsible for extrajudicial killings, torture, or other gross violations of internationally recognized human rights committed against individuals seeking:
      1. (i)To expose illegal activity carried out by officials of the Government of the Russian Federation; or
      2. (ii)To obtain, exercise, defend, or promote internationally recognized human rights and freedoms, such as the freedoms of religion, expression, association, and assembly, and the rights to a fair trial and democratic elections, in Russia; or
   3. (3)Acted as an agent of or on behalf of a person in a matter relating to an activity described in paragraph (a)(1) or (2) of this section.
2. (b)The prohibitions in paragraph (a) of this section include prohibitions on the following transactions:
   1. (1)The making of any contribution or provision of funds, goods, or services by, to, or for the benefit of any person whose property and interests in property are blocked pursuant to paragraph (a) of this section, except for donations by United States persons of articles, such as food, clothing, and medicine, intended to be used to relieve human suffering; and
   2. (2)The receipt of any contribution or provision of funds, goods, or services from any person whose property and interests in property are blocked pursuant to paragraph (a) of this section.
3. (c)Unless authorized by this part or by a specific license expressly referring to this section, any dealing in any securities (or evidence thereof) held within the possession or control of a U.S. person and either registered or inscribed in the name of, or known to be held for the benefit of, or issued by, any person whose property and interests in property are blocked pursuant to paragraph (a) of this section is prohibited. This prohibition includes the transfer (including the transfer on the books of any issuer or agent thereof), disposition, transportation, importation, exportation, or withdrawal of, or the endorsement or guaranty of signatures on, any securities on or after the effective date. This prohibition applies irrespective of the fact that at any time (whether prior to, on, or subsequent to the effective date) the registered or inscribed owner of any such securities may have or might appear to have assigned, transferred, or otherwise disposed of the securities.
4. (d)The prohibitions in paragraph (a) of this section apply except to the extent transactions are authorized by regulations, orders, directives, rulings, instructions, licenses, or otherwise, and notwithstanding any contract entered into or any license or permit granted prior to the effective date.