Is there information available regarding EIA-310-D, EIA/ECA-310-D and EIA/ECA-310-E?

Issue:
Clarification is needed on the various EIA 310 governing bodies.

Product Line:
NetShelter SX, NetShelter VX, NetShelter WX, NetShelter SV
 
Environment:
All versions and serial ranges.
 
Cause:
The EIA 310 organization has changed specification and owners in the past several years. What is the difference between these governing bodies?
 
Resolution:
See attached file