Just to close this out, doesn't appear that we should expect resolution on this anytime soon:
"Just following up on this (was TDY overseas the last two weeks).
Might make the most sense to re-issue the msg to include all of the intended designators (to include non-URLs) in the new subspecialty (since it appears that was the intent)."
"We are working with the other communities who are interested in this subspecialty. Once the framework is built, these other communities will distribute information about who is included and how they will use them."