In the amateur radio service, it is permissible to broadcast:

In the amateur radio service, the term 'broadcasting' generally refers to transmitting one-way information intended for the general public, which is strictly prohibited. This prohibition includes playing music, commercially recorded material, or rebroadcasting commercial radio programming. However, there is a specific and vital exception for emergencies. It is permissible to broadcast radio communications if they are urgently required for the safety of life and the protection of property. In such critical situations, disseminating emergency information to anyone who might hear it is legally allowed.