22 U.S.C. § 448
Whenever the President shall have issued a proclamation under the authority of section 441(a) of this title, it shall thereafter be unlawful for any person within the United States to solicit or receive any contribution for or on behalf of the government of any state named in such proclamation or for or on behalf of any agent or instrumentality of any such state.
Nothing in this section shall be construed to prohibit the solicitation or collection of funds and contributions to be used for medical aid and assistance, or for food and clothing to relieve human suffering, when such solicitation or collection of funds and contributions is made on behalf of and for use by any person or organization which is not acting for or on behalf of any such government, but all such solicitations and collections of funds and contributions shall be in accordance with and subject to such rules and regulations as may be prescribed.
Whenever any proclamation issued under the authority of section 441(a) of this title shall have been revoked with respect to any state the provisions of this section shall thereupon cease to apply with respect to such state, except as to offenses committed prior to such revocation.
22 U.S.C. § 448