"Once you have that CPA after your name, you are supposed to know everything." WAY too much expectation. If you know how to get the current answer and have sense enough to see if it makes sense, you have earned your letters.
I ponder taking the only somewhat recognized payroll pro cert, but I have seen the sample questions, and while a good gatekeeping tool for those who want such a thing, it does not mean - to me - a holder can handle a payroll on their own. I actually signed up this year, but because I am my own employer, I have to do something (step/steps unknown at present) so I can say I have the experience needed (I am effectively challenging, I want to do it with no actual study). But their process somehow failed to send me the requirements to certify myself, and even a direct email did not get it going, so I am not liking their process (which devalues it in my mind). I am considered an "expert" in their online group board, I guess whoever monitors that has determined I give reasonable help/suggestions...
Back to the OP, I would assume to start the NCUA knows their stuff, and they have dealt with this before and have many other members already doing what they suggest/require. If it is possible to see public books of another member (maybe your own CU if you are a member of a CU) that may help with real world view. The NCUA is a likely powerful governing body, so taking them on likely will be expensive, if not detrimental, to the CU.