Permissible marks and enclosures

§ 4365. Permissible marks and enclosures (a) Second class mail may contain no writing, print, or sign thereon or therein, in addition to the original print except— (1) the name and address of the person to whom the mail is sent and directions for transmission, delivery, forwarding or return; (2) index figures of subscription book either printed or written; (3) the printed title of the publication and the place of its publication; (4) the printed or written name and address without addition of advertisement of the publisher or sender, or both; (5) written or printed words or figures, or both, indicating the date on which the subscription to the matter will end; (6) the correction of typographical errors; 74 Stat. 671 (7) a mark except written or printed words to designate a word or passage to which it is desired to call attention; (8) the words “sample copy” when the matter is sent as such; and (9) the words “marked copy” when the matter contains a marked item or article. (b) Publishers and news agents may enclose in their publications bills, receipts and orders for subscriptions. (c) This section does not prohibit the insertion in periodicals of advertisements permanently attached thereto.