While it appears that everyone has different views on the subject, must be used in funeral services, cannot be multi-door based on a cheap chassis, if it was not actually used in livery service but usually was the type that would be considered for that then it's ok, can't have J-seats, TV's, or bars, etc., I see nothing in the bylaws that prohibits any of those.
If those things are not acceptable, then maybe someone needs to look into updating the bylaws with those requirements. But as it currently stands, you can show up with a 1957 Chevy converted in 2005 into an 8 wheel, 42' foot long, hot tub in trunk, 8 door limo with bar, J-seats, TV, and dance floor, and there is nothing to prevent it from being shown, judged, and winning awards.
I thought there would be some sort of requirements prohibiting that type of vehicle, but apparently there are not.
A few years ago, someone refused to count a 1950's car stretched into a superstretch limo in the 1990's, in the official car count for a meet. While this post was not in regards to that, it appears that they had absolutely no right to do that.