Since I dislike having PM's relevant to a discussion that can show other possiblities, I post the follwing:
You are very correct. Unfortunately, ALPA attorney's (2 separate ones) have advised that we can't tie the holding company to the Atlas or Polar certificates and associated labor contracts.
Subsidiary language would have to be totally voluntary on the holding company. Not likely to happen. It would be a first. I could see that as workable, but not likely when all they have to do is dance an advantage out in front of the other crew force to secure leverage against the other.
Good idea, but unworkable unless you have been given different advice/orders from National.
The same response I sent: It has been done. I worked under such a scope clause and it prevented a whipsaw startup endorsed by the other union, and prevented them from taking a 49% ownership in another carrier to circumvent the CBA.
To you, I submit:
https://www.republicpilots.org/CBA.pdf Section 1 Para. D is a good read.
To the lawyers that say it's impossible, I say no. It's impossible to vote "Yes" on any contract that doesn't have a binder scope.