Avri,
I agree with your analysis and share your concern. The PTI IRP is fundamentally not a Bylaws issue (or more accurately -- fundamentally not a "violation of the Bylaws" issue).
Having "borrowed" the IRP in an attempt to fill the requirements of the CWG, we can't then pretend that the requirements of the CWG are coterminous with the general design of the IRP. The CWG's requirements will require a specific statement of the basis on which a claim may be brought -- and it is a different basis than for other IRP claims. This doesn't have to be long, but it does have to be right.
Conversely, if we are truly wedded to the idea that the IRP is a "bylaws court" and nothing more, then it can't be used to satisfy the CWG's requirement and we will need to do something else. Personally, I don't endorse this position (though it does raise some concern about the ability of the panel to deal with PTI failures, if it is designed to be a bylaws court. That said, I have sufficient faith in the skill of experienced arbitrators to be able to resolve a variety of disputes.)
Since this a requirement for the transition, we need to resolve this crisply, explicitly and appropriately.
Greg