The pattern behind the prohibitions
Part 97’s bans look like a grab-bag until you read them against the Basis and Purpose. The amateur service exists for technical self-training, emergency capability, and international goodwill. Anything that turns it into a broadcast medium, a business, or a private channel undermines that, and is banned — with narrow exceptions where the activity does serve a purpose.
Learn the pattern and the list stops needing memorisation.
Broadcasting
How does the FCC define broadcasting for the Amateur Radio Service?
Transmissions intended for reception by the general public.
That is the definition, and it is about intent and audience, not about power or content. A high-power transmission to one station is not broadcasting; a low-power transmission meant for anyone who happens to hear it is.
Consequently, one-way transmissions are prohibited when they amount to broadcasting. Not all one-way transmissions — beacons, telecommand, and code practice are all one-way and all permitted. The prohibited case is the one directed at the general public.
Codes and ciphers
Messages encoded to obscure their meaning are prohibited, with one exception:
Only when transmitting control commands to space stations or model craft.
The distinction that trips people is between obscuring and encoding. FT8, PSK31, and packet are digital encodings with published specifications — anyone with the right software decodes them, so nothing is obscured. Encryption intended to keep content from other amateurs is what the rule forbids.
Music
Prohibited, with one narrow exception:
When incidental to an authorised retransmission of manned spacecraft communications.
If NASA audio carries music and an amateur station is authorised to retransmit it, the music rides along lawfully. Playing music into a microphone is prohibited in every other case, including as an identifier or a joke.
Business, compensation, and equipment sales
The general rule is that amateur stations may not be used for the licensee’s pecuniary interest. Two exceptions the pool asks about:
Selling amateur radio equipment — permitted when selling amateur radio equipment and not on a regular basis. Announcing a rig for sale is fine; running a shop over the air is not.
Compensation for a control operator — permitted when the communication is a part of classroom instruction at an educational institution. A teacher paid to run a classroom station is doing exactly what §97.1 asks for.
Broadcasting support and news
When may amateur stations transmit information in support of broadcasting, program production, or news gathering, assuming no other means is available?
When such communications are directly related to the immediate safety of human life or protection of property
Not “when the story is important”. The test is immediate safety of life or protection of property, and it is deliberately narrow: amateur radio is not a production resource for media organisations.
Indecent and obscene language
What, if any, are the restrictions concerning transmission of language that may be considered indecent or obscene?
Any such language is prohibited.
No time-of-day exception, no band exception. Unlike broadcast radio, where indecency rules vary by daypart, amateur radio has a flat prohibition.
Prohibited countries
FCC-licensed stations must not exchange communications with any country whose administration has notified the ITU that it objects to such communications. The list is maintained internationally rather than by the FCC, and it is short.
Auxiliary stations
Which of the following is an example of an auxiliary station?
A station sending one-way transmissions between a remote repeater receiver and the main repeater transmitter
An auxiliary station is infrastructure — links between parts of a repeater system, control links, remote receivers. It is worth knowing because auxiliary stations get their own frequency coordination and their own rules.
Identification, even when testing
Two questions worth pairing:
On-the-air test transmissions require you to identify the transmitting station. Tuning up into a dummy load is not on the air; keying a carrier onto an antenna is, and it needs your call sign.
The one case where you may transmit without identifying is when transmitting signals to control model craft. That exception exists because a model-control transmitter has no way to send a call sign — and it comes with its own conditions elsewhere in Part 97, including a label on the transmitter and a one-watt limit.
Check yourself
- Is transmitting an FT8 signal a prohibited “code or cipher”?
- You want to sell your old handheld over the air. Permitted?
- You key up briefly to check your SWR into an antenna. What do you owe?
Answers
- No. FT8 is a published encoding that anyone can decode — nothing is obscured. The ban is on messages encoded to hide their meaning.
- Yes, when selling amateur radio equipment and not on a regular basis.
- Your call sign. On-the-air test transmissions require identification of the transmitting station.