[1] ATIS is only required for analog television transmission and only via satellites or earth stations under United States jurisdiction.
ATIS is a Morse code transmission sent on a subcarrier of 7.1 MHz and must activate automatically any time the station is transmitting.
The ATIS message is sent at a transmission rate of 15 to 25 words per minute and must not exceed 30 seconds in its entire length.
The telephone number must immediately connect to personnel who can resolve radio interference and other frequency coordination issues.
ATIS encoders must be included in the uplink airchain of all transmitters as of March 1, 1991 "in a method that cannot easily be defeated".