> §97.111 Authorized transmissions.
> (b) In addition to one-way transmissions specifically authorized elsewhere in this part, an amateur station may transmit the following types of one-way communications:
> (1) Brief transmissions necessary to make adjustments to the station;
> (2) Brief transmissions necessary to establishing two-way communications with other stations;
> (3) Telecommand;
> (4) Transmissions necessary to providing emergency communications;
> (5) Transmissions necessary to assisting persons learning, or improving proficiency in, the international Morse code; and
> (6) Transmissions necessary to disseminate information bulletins.
> (7) Transmissions of telemetry.
It may fall under "Transmissions necessary to disseminate information bulletins."