With which of the following conditions must beacon stations comply?

FCC Part 97 rules dictate specific operating conditions for amateur beacon stations, which are used to observe propagation and for other experimental purposes. One strict condition is that no more than one beacon station may transmit in the same frequency band from a single station location. This rule prevents a single operator or club from monopolizing a band with multiple automated beacon transmissions from their site. While beacon frequencies are often coordinated voluntarily by regional groups to avoid interference, there is no FCC requirement to coordinate with a 'National Beacon Organization' or to publish frequencies on the internet.