What practice is NOT allowed for an amateur station regarding broadcasting?

Amateur radio operators must adhere to specific regulations that govern their activities, primarily to ensure that the amateur spectrum is used for non-commercial purposes. Broadcasting music without modification and transmitting commercial advertisements are specifically prohibited practices within amateur radio operations.

The choice regarding transmitting commercial advertisements is particularly relevant because amateur stations must not engage in any form of commercial activity. The essence of amateur radio is to promote communication for personal enjoyment and public service, not for profit. Amateur licenses do not allow operators to disseminate information for commercial gain or promote businesses, which is why this practice is not permitted.

On the other hand, providing emergency information and participating in public service announcements align with the core functions of amateur radio. These activities are encouraged as they can significantly contribute to public welfare, especially during emergencies or for community awareness. Thus, the restrictions around commercial activities serve to maintain the integrity and purpose of amateur radio as a non-commercial means of communication.