"The way I read that, is that you can't have any penalties assess against you in the event of a negative ruling on a 13.9. I'm not so sure that you're correct about the 13.9 not being applicable to anyone else. It's an interpretation of a rule, and should impact any test of that rule. And where did you find the language that says prior rules interpretations are not binding on subsequent ones?"
The way it is written it can certainly be read that way. I just thought that surely that's not what they meant because why would anyone think that you would be assessed penalty points simply for asking a hypothetical question? Moreover, the immunity from penalties would furnish the return for your $250; otherwise, why bother? So, using established techniques for interpretation of ambiguous language, I am confident that a 13.9 in your favor allows you to make the mod you asked about w/o fear of being penalized for it.
As to who it applies to, first of all I was told that by the steward I referred to earlier. Also notice that it says that a compliant ruling will not even be published - no one else would even know about it so how could they take advantage of it? The local SOM would not even know about it!
There is no language dealing w/ the precedential effect of COA opinions. And, in the absence of such, the default is that there is none. It would take affirmative language to make it so, or the COA could adopt an internal rule that it would follow precedent. Cite me one COA opinion that referred back to a prededing one (other than an identical protest at the same event). I have seen 2 opinions in the same issue of Fastrack w/ contrary outcomes from different COAs on very similar issues. As far as I know, there is no indexed library of COA opinions so there is no way at present for the COA to even research issues that may have been previously decided. If anyone knows anything different, please speak up.
As I have argued before, there is zero consistency in interpretation of the passing rules, which are so vague as to be practically useless. If we had precedential rulings we could establish a body of interpretation over time that would supplement the rules and give us a much better idea of what is expected of us. (FWIW I e-mailed Randy Pobst and he completely agrees w/ me on the uselessness of our rules and the inconsistent interpretations of them.)