Each special message transmitted under section 683 or 684 of this title shall be transmitted to the House of Representatives and the Senate on the same day, and shall be delivered to the Clerk of the House of Representatives if the House is not in session, and to the Secretary of the Senate if the Senate is not in session. Each special message so transmitted shall be referred to the appropriate committee of the House of Representatives and the Senate. Each such message shall be printed as a document of each House.
If any information contained in a special message transmitted under section 683 or 684 of this title is subsequently revised, the President shall transmit to both Houses of Congress and the Comptroller General a supplementary message stating and explaining such revision. Any such supplementary message shall be delivered, referred, and printed as provided in subsection (a). The Comptroller General shall promptly notify the House of Representatives and the Senate of any changes in the information submitted by him under subsection (b) which may be necessitated by such revision.