Sec.  73.28   Assignment of stations to channels.

   (a) The Commission will not make an AM station assignment that does not
   conform with international requirements and restrictions on spectrum use
   that the United States has accepted as a signatory to treaties, conventions,
   and other international agreements. See  Sec. 73.1650 for a list of pertinent
   treaties, conventions and agreements, and  Sec. 73.23 for procedural provisions
   relating to compliance with them.

   (b) Engineering standards now in force domestically differ in some respects
   from those specified for international purposes. The engineering standards
   specified  for  international  purposes  (see   Sec. 73.1650, International
   Agreements) will be used to determine:

   (1) The extent to which interference might be caused by a proposed station
   in the United States to a station in another country; and

   (2) whether the United States should register an objection to any new or
   changed assignment notified by another country. The domestic standards in
   effect in the United States will be used to determine the extent to which
   interference exists or would exist from a foreign station where the value of
   such interference enters into a calculation of:

   (i) The service to be rendered by a proposed operation in the United States;
   or

   (ii) the permissible interfering signal from one station in the United
   States to another United States station.

   [ 28 FR 13574 , Dec. 14, 1963, as amended at  29 FR 9499 , July 11, 1964;  49 FR 32358 , Aug. 14, 1984;  50 FR 18821 , May 2, 1985;  54 FR 39736 , Sept. 28, 1989;
    56 FR 64857 , Dec. 12, 1991]