This is from US Code, not CFR.
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TITLE 47--TELEGRAPHS, TELEPHONES, AND RADIOTELEGRAPHS
CHAPTER 5--WIRE OR RADIO COMMUNICATION
SUBCHAPTER VI--MISCELLANEOUS PROVISIONS
Sec. 605. Unauthorized publication or use of communications
(a) Practices prohibited
Except as authorized by chapter 119, title 18, no person receiving,
assisting in receiving, transmitting, or assisting in transmitting, any
interstate or foreign communication by wire or radio shall divulge or
publish the existence, contents, substance, purport, effect, or meaning
thereof, except through authorized channels of transmission or
reception, (1) to any person other than the addressee, his agent, or
attorney, (2) to a person employed or authorized to forward such
communication to its destination, (3) to proper accounting or
distributing officers of the various communicating centers over which
the communication may be passed, (4) to the master of a ship under whom
he is serving, (5) in response to a subpena issued by a court of
competent jurisdiction, or (6) on demand of other lawful authority. No
person not being authorized by the sender shall intercept any radio
communication and divulge or publish the existence, contents, substance,
purport, effect, or meaning of such intercepted communication to any
person. No person not being entitled thereto shall receive or assist in
receiving any interstate or foreign communication by radio and use such
communication (or any information therein contained) for his own benefit
or for the benefit of another not entitled thereto. No person having
received any intercepted radio communication or having become acquainted
with the contents, substance, purport, effect, or meaning of such
communication (or any part thereof) knowing that such communication was
intercepted, shall divulge or publish the existence, contents,
substance, purport, effect, or meaning of such communication (or any
part thereof) or use such communication (or any information therein
contained) for his own benefit or for the benefit of another not
entitled thereto. This section shall not apply to the receiving,
divulging, publishing, or utilizing the contents of any radio
communication which is transmitted by any station for the use of the
general public, which relates to ships, aircraft, vehicles, or persons
in distress, or which is transmitted by an amateur radio station
operator or by a citizens band radio operator.