If anybody on this forum can actually identify the year of every RV that was ever made by looking at it, raise your hand. Neither can RV park owners.
There are two reasons for the rule.
1. People on this very forum complain about old, beat up RVs in a park where they are staying. That's bad advertising for the RV park.
2. An RV must be the toughest thing to throw away. Unless you find a salvage yard that can part it out, you're out of luck. OR, you can pull into an RV park that will take you. (Don't use your real name.) Then at night, remove the license plates from the RV or TT, hop in the TV or toad, and hit the road, making it the park owner's problem.
My 'C' turns 10 this year. But its stored in a heated building that I own when not on the road, and looks new. Next year, it magically becomes a 2006. If I get caught, they don't take away my next birthday, I just have to leave.
P.S. If anybody out there can identify the year of a classic Airstream by looking at it....