§ 25.285   Operation of MSS and ATC transmitters or transceivers on board civil
aircraft.

   (a) Operation of any of the following devices aboard civil aircraft is
   prohibited, unless the device is installed in a manner approved by the
   Federal Aviation Administration or is used by the pilot or with the pilot's
   consent:

   (1) Earth stations capable of transmitting in the 1.5/1.6 GHz, 1.6/2.4 GHz,
   or 2 GHz Mobile-Satellite Service frequency bands;

   (2) ATC terminals capable of transmitting in the 1.5/1.6 GHz or 1.6/2.4 GHz
   MSS bands;

   (3) Earth stations used for non-voice, non-geostationary Mobile-Satellite
   Service communication that can emit radiation in the 108-137 MHz band.

   (b) No portable device of any type identified in paragraph (a) of this
   section (including transmitter or transceiver units installed in other
   devices that are themselves portable) may be sold or distributed to users
   unless it conspicuously bears the following warning: “This device must be
   turned off at all times while on board aircraft.” For purposes of this
   section, a device is portable if it is a “portable device” as defined in
   § 2.1093(b) of this chapter or is designed to be carried by hand.

   [ 79 FR 8325 , Feb. 12, 2014]

   Effective Date Note: At  79 FR 44140 , July 30, 2014, in § 25.285, paragraph
   (a)(2)  was  corrected.  This text contains information collection and
   recordkeeping requirements and will not become effective until approval has
   been given by the Office of Management and Budget.

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