Sec.  5.101   Frequency stability.

   An applicant must propose to use a frequency tolerance that would confine
   emissions within the band of operation, unless permission is granted to use
   a greater frequency tolerance. Equipment is presumed to operate over the
   temperature range −20 to +50 degrees celsius with an input voltage variation
   of 85% to 115% of rated input voltage, unless justification is presented to
   demonstrate otherwise.