Lists up through and including C3B are re-evaluated every 2 or 3 years.
Only qualified callers vote upon potential changes.
CALLERLAB is officially in charge of C3A and below.
At C4, callers are free to call whatever calls and concepts (within reason)
that they like. Many callers maintain their own lists.
Kathy Godfrey's Unified C4 List (Nov 1998)
is a union of the C4 lists from several major C4 callers.
If you have any suggestions for changes to any of the lists (C3B and below),