There is nothing "official". We do have an unofficial list.. You should be able to figure it out.
That is part of what makes people get tired of the "Good old Boy" crap. (or as I was told at a CDS meeting, I shouldn't think of it like a good ole boy network but more a fraternity...because that is MUCH better...LOL) If other agencies have a training program the CDS feels is substandard have the courage to clearly say who and why.
Having an unofficial list just makes it subject to abuse and being ignored when the potential crossover is a "diving buddy who really has his/her stuff together unlike the rest of that crowd"
Plus, we aren't even addressing how many if not most Instructor Trainers(CD's) for the main line agencies that are now doing cave are also CDS and/or NACD instructors, and somehow it's OK that they teach the type of program you are decrying for the other agency it's perfectly fine that they remain CDS and/or NACD instructors at the lower levels. If indeed the CDS and/or NACD have an issue with how some are doing this, they need to stop being hypocrites and put their money where their mouth is and remove instructors that also teach for other agencies who's standards are not, in the sole view of the CDS and/or NACD, up to snuff at any level.
But they won't and we both know it because of money and politics.
I agree with you that there needs to be more....fidelity for lack of a better word in cave instructor training.