This should be interesting. Remember that you are dealing with advertising, where a specific ad might be in play for at most several days. By the time that adjudicatory hearing happens, the ad will have been off the air for months to years. Cease and desist? Soitanly, yer honor! Nyuck, nyuck, nyuck!
I particularly like that this falls back ultimately to the "Yeah, but I know it when I hear it" process. "Please note that the complaint was lodged by a person using a Pioneer YSR-701K receiver, which is known to excessively expand the audio range by several decibels." There are many 'moving parts' between the recording studio and the listener's speakers. That provides plenty of room for finger pointing and argument. (It's all billable hours, though, so I don't mind.)
I've said it before, and I'll say it again. This sort of regulation is doomed to fail, or at least provide a really nice living to people familiar with the issues.
Advertising can continue to be obnoxious without fear of any real impact.
Anyone notice the ads now being put in-line in TV shows and movies? The 60 second product demo for voice navigation in the detective's car? Actors setting down their sodas and turning the can so the label faces the camera?