Has anyone ever heard of or seen verbiage anywhere requiring the inclusion of modifications to standard in the ACM? Looking through the ACM advisory circular, I think it vaguely eludes to this in section 204-b (exemptions). But I have not been able to find any clear statement requiring mods to standard in the ACM.
Asking because a state transportation (not FAA) inspector who recently visited our airport seemed to believe this is the case. Not trying to do more work than we need to, pretty busy as it is. Any information will be greatly appreciated.