Section 97.221 - Automatically controlled digital station(a) This rule section does not apply to an auxiliary station, a beacon station, a repeater station, an earth station, a space station, or a space telecommand station.(b) A station may be automatically controlled while transmitting a RTTY or data emission on the 6 m or shorter wavelength bands, and on the 28.120-28.189 MHz, 24.925-24.930 MHz, 21.090-21.100 MHz, 18.105-18.110 MHz, 14.0950-14.0995 MHz, 14.1005-14.112 MHz, 10.140-10.150 MHz, 7.100-7.105 MHz, or 3.585-3.600 MHz segments.(c) Except for channels specified in § 97.303(h) , a station may be automatically controlled while transmitting a RTTY or data emission on any other frequency authorized for such emission types provided that:(1) The station is responding to interrogation by a station under local or remote control; and(2) No transmission from the automatically controlled station occupies a bandwidth of more than 500 Hz.60 FR 26001, May 16, 1995, as amended at 72 FR 3082 , Jan. 24, 2007; 77 FR 5412 , Feb. 3, 2012