Every person within the United States who is an agent of a foreign principal and required to register under the provisions of this subchapter and who transmits or causes to be transmitted in the United States mails or by any means or instrumentality of interstate or foreign commerce any informational materials for or in the interests of such foreign principal (i) in the form of prints, or (ii) in any other form which is reasonably adapted to being, or which he believes will be, or which he intends to be, disseminated or circulated among two or more persons shall, not later than forty-eight hours after the beginning of the transmittal thereof, file with the Attorney General two copies thereof.

It shall be unlawful for any person within the United States who is an agent of a foreign principal and required to register under the provisions of this subchapter to transmit or cause to be transmitted in the United States mails or by any means or instrumentality of interstate or foreign commerce any informational materials for or in the interests of such foreign principal without placing in such informational materials a conspicuous statement that the materials are distributed by the agent on behalf of the foreign principal, and that additional information is on file with the Department of Justice, Washington, District of Columbia. The Attorney General may by rule define what constitutes a conspicuous statement for the purposes of this subsection.

The copies of informational materials required by this subchapter to be filed with the Attorney General shall be available for public inspection under such regulations as he may prescribe.

For purposes of the Library of Congress, other than for public distribution, the Secretary of the Treasury and the United States Postal Service are authorized, upon the request of the Librarian of Congress, to forward to the Library of Congress fifty copies, or as many fewer thereof as are available, of all foreign prints determined to be prohibited entry under the provisions of section 1305 of title 19 and of all foreign prints excluded from the mails under authority of section 1717 of title 18.

Notwithstanding the provisions of section 1305 of title 19 and of section 1717 of title 18, the Secretary of the Treasury is authorized to permit the entry and the United States Postal Service is authorized to permit the transmittal in the mails of foreign prints imported for governmental purposes by authority or for the use of the United States or for the use of the Library of Congress.

It shall be unlawful for any person within the United States who is an agent of a foreign principal required to register under the provisions of this subchapter to transmit, convey, or otherwise furnish to any agency or official of the Government (including a Member or committee of either House of Congress) for or in the interests of such foreign principal any political propaganda or to request from any such agency or official for or in the interests of such foreign principal any information or advice with respect to any matter pertaining to the political or public interests, policies or relations of a foreign country or of a political party or pertaining to the foreign or domestic policies of the United States unless the propaganda or the request is prefaced or accompanied by a true and accurate statement to the effect that such person is registered as an agent of such foreign principal under this subchapter.

Whenever any agent of a foreign principal required to register under this subchapter appears before any committee of Congress to testify for or in the interests of such foreign principal, he shall, at the time of such appearance, furnish the committee with a copy of his most recent registration statement filed with the Department of Justice as an agent of such foreign principal for inclusion in the records of the committee as part of his testimony.