As a licensed radio amateur, it’s important to know what you can and can’t do on the air. For example, any language that is considered obscene or indecent is prohibited. (T1D06). For the most part, transmitting music is also prohibited. The only time an amateur station is authorized to transmit music is when incidental to an authorized retransmission of manned spacecraft communications (T1D04).
Transmitting any codes whose specifications are not published or well-known is prohibited. The transmission of codes or ciphers that hide the meaning of a message transmitted by an amateur station is allowed only when transmitting control commands to space stations or radio control craft (T1D03).
Amateur radio operators are only allowed to communicate with other amateur radio stations, except in specific instances. For example, in an emergency, you are allowed to communicate with stations in other radio services. Another example is during the special event called Armed Forces Day Communications Test. An FCC-licensed amateur station may exchange messages with a U.S. military station during an Armed Forces Day Communications Test (T1D02).
FCC-licensed amateur stations are prohibited from exchanging communications with any country whose administration has notified the ITU that it objects to such communications. (T1D01) Currently, there are no countries that U.S. amateurs are prohibited from contacting.
Amateur radio operators may not use their stations to make money, except in some very special circumstances. For example, the control operator of an amateur station may receive compensation for operating the station only when the communication is incidental to classroom instruction at an educational institution (T1D08). Amateur radio operators may use their stations to notify other amateurs of the availability of equipment for sale or trade, but only when the equipment is normally used in an amateur station and such activity is not conducted on a regular basis (T1D05).
All amateur communications must be station to station. That is to say, amateur radio operators may not broadcast. The term broadcasting in the FCC rules for the amateur services means transmissions intended for reception by the general public (T1D10). Only when transmitting code practice, information bulletins, or transmissions necessary to provide emergency communications may an amateur radio station engage in broadcasting. (T1D12)
Amateur stations are authorized to transmit signals related to broadcasting, program production, or news gathering, assuming no other means is available, only where such communications directly relate to the immediate safety of human life or protection of property. (T1D09).
So, what is allowed? Communications incidental to the purposes of the amateur service and remarks of a personal character are the types of international communications that are permitted by an FCC-licensed amateur station (T1C03).