§  74.551   Equipment changes.

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

   (b) Permissible changes in equipment operating in the bands 18.3–18.58,
   18.76–18.82 GHz and 19.1–19.16 GHz. Notwithstanding other provisions of
   this section, licensees of stations that remain co-primary under the
   provisions of § 74.502(c) 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 13716 , Dec. 14, 1963, as amended at  38 FR 6827 , Mar. 13, 1973;
    47 FR 54448 , Dec. 3, 1982;  49 FR 7130 , Feb. 27, 1984;  50 FR 48599 , Nov.
   26, 1985;  58 FR 19775 , Apr. 16, 1993;  61 FR 4368 , Feb. 6, 1996;  65 FR 54172 , Sept. 7, 2000;  68 FR 12768 , Mar. 17, 2003;  68 FR 16967 , Apr. 8,
   2003;  68 FR 20225 , Apr. 24, 2003;  69 FR 43772 , July 22, 2004]