Sec.  90.553   Encryption.

   (a) Encryption is permitted on all but the two nationwide Interoperability
   calling channels. Radios employing encryption must have a readily accessible
   switch or other readily accessible control that permits the radio user to
   disable encryption.

   (b) If Encryption is employed then the following encryption protocol must be
   used:  Project  25 DES Encryption Protocol, approved January 23, 2001,
   Telecommunications Industry Association, ANSI/TIA/EIA-102.AAAA-A-2001.

   (c) The Director of the Federal Register approves this incorporation by
   reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies of
   the standard listed in this section that are incorporated by reference may
   be inspected at the Federal Communications Commission, 445 12th Street, SW.,
   Washington, DC (Reference Information Center) or at the National Archives
   and Records Administration (NARA). For information on the availability of
   this    material    at    NARA,   call   202–741–6030,   or   go   to:
   http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_loc
   ations.html. The standard can also be purchased from TIA/EIA, 2500 Wilson
   Boulevard, Arlington, VA, 22201; Global Engineering Documents, 15 Inverness
   Way East, Englewood, CO 80112; or the American National Standards Institute,
   25 West 43rd Street, Fourth Floor, New York, NY 10036 (or via the Internet
   at www.ansi.org. )

   [ 66 FR 10636 , Feb. 16, 2001, as amended at  67 FR 61006 , Sept. 26, 2002]