§  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, § 25.285(a)(2) was
   corrected. This paragraph contains information collection and
   recordkeeping requirements and will not become effective until approval
   has been given by the Office of Management and Budget.