Sec.  74.651   Equipment changes.

   (a) Modifications may be made to an existing authorization in accordance
   with  Sec.  Sec. 1.929 and 1.947 of this chapter.

   (b) Multiplexing equipment may be installed on any licensed TV broadcast
   STL, TV relay or translator relay station without authority from the
   Commission.

   (c) Permissible changes in equipment operating in the bands 18.3–18.58 GHz
   and 19.26–19.3 GHz. Notwithstanding other provisions of this section,
   licensees of stations that remain co-primary under the provisions of
    Sec. 74.602(g) may not make modifications to their systems that increase
   interference to satellite earth stations, or result in a facility that would
   be more costly to relocate.

   [ 28 FR 13718 , Dec. 14, 1963, as amended at  38 FR 6827 , Mar. 13, 1973;  47 FR 54448 , Dec. 3, 1982;  47 FR 55938 , Dec. 14, 1982;  49 FR 7131 , Feb. 27, 1984;
    58 FR 19776 , Apr. 16, 1993;  61 FR 4368 , Feb. 6, 1996;  63 FR 36605 , July 7,
   1998;  65 FR 54173 , Sept. 7, 2000;  68 FR 12771 , Mar. 17, 2003;  68 FR 16967 ,
   Apr. 8, 2003]