Sec. 87.265  Administrative communications.

    Domestic VHF aeronautical enroute stations authorized to use A9W 
emission on any frequency listed in Sec. 87.263(a)(1) or 
Sec. 87.263(a)(3) may transmit digital administrative communications on 
a secondary basis, in addition to the operational and control 
communications routinely permitted under Sec. 87.261(a) above. Such 
secondary administrative communications must directly relate to the 
business of a participating aircraft operator in providing travel and 
transportation services to the flying public or to the travel, 
transportation or scheduling activities of the aircraft operator itself. 
Stations transmitting administrative communications must provide 
absolute priority for operational control and other safety 
communications by means of an automatic priority control system.
[ 54 FR 11721 , Mar. 22, 1989]

                       Aeronautical Fixed Stations