Pub. L. 86-682, tit. 39, pt. IV, ch. 63, sec. 4364
Information to be furnished by mailer
§ 4364. Information to be furnished by mailer With the first mailing of each issue of a publication mailed as second class mail, the publisher shall file a copy of the issue together with a statement containing such information as the Postmaster General prescribes for determining the postage to be paid.