Sec.  61.131   Scope.

   Sections  61.132  through  61.136  apply  to a carrier which must file
   concurrences reflecting rates and regulations for through service provided
   in conjunction with other carriers and to a carrier which has chosen, as an
   alternative to publishing its own tariff, to arrange concurrence in an
   effective tariff of another carrier. Limited or partial concurrences will
   not be permitted.