Easiest way to test MEC's scope resolve.
At an LEC meeting submit resolution that says, all domestic flying with Delta code in an aircraft with "Delta" on the paint job and sold by Delta Airlines will be done by a DAL seniority list pilot. Additionally direct LEC reps to request recorded vote on ALL actions taken on said agenda item.
I have not included international because the current thread addresses holes in domestic scope wrt RJ's.
Send that resolution to an MEC meeting (if it passes at LEC meeting).
If it fails, you have your answer.
If it is "RECEIVED", you have your answer.
If it is TABLED you have your answer.
If it is WITHDRAWN you have a bone to pick with your LEC reps and you have your answer.
If it is EXPUNGED you have your answer.
If it passes be happy with a caveat of doveryai, no proveryai (google it with Ronald Reagan)