47 CFR 95.413 - (CB Rule 13) What communications are prohibited?
(a) You must not use a CB station -
(1) In connection with any activity which is against federal, state or local law;
(2) To transmit obscence, indecent or profane words, language or meaning;
(3) To interfere intentionally with the communications of another CB station;
(4) To transmit one-way communications, except for emergency communications, traveler assistance, brief tests (radio checks), or voice paging;
(5) To advertise or solicit the sale of any goods or services;
(6) To transmit music, whistling, sound effects or any material to amuse or entertain;
(7) To transmit any sound effect solely to attract attention;
(8) To transmit the word “MAYDAY” or any other international distress signal, except when your station is located in a ship, aircraft or other vehicle which is threatened by grave and imminent danger and your are requesting immediate assistance;
(9) To communicate with, or attempt to communicate with, any CB station more than 250 kilometers (155.3 miles) away;
(10) To advertise a political candidate or political campaign; (you may use your CB radio for the business or organizational aspects of a campaign, if you follow all other applicable rules);
(11) To communicate with stations in other countries, except General Radio Service stations in Canada; or
(12) To transmit a false or deceptive communication.
(b) You must not use a CB station to transmit communications for live or delayed rebroadcast on a radio or television broadcast station. You may use your CB station to gather news items or to prepare programs.