Regarding a basic conversion, it's also not clear how one arrived at the $500 to $800 cost estimate for converting a vehicle without a fixed toilet. One product, I'm told, is $900 just for the unit, which does not include installation and modifying the vehicle to suit. While some may attempt some DIY, it's probably best left to the professionals, given there's a standard that needs to be met. So that's a huge cost burden. The cost associated with this law could be high and, easily, as I said, encourage non-compliance.