Batman:
Having a toilet doesn't mean they'll use them
Very true. All they need for a self-contained sticker is a portaloo. You can get a self-contained certification for a small station wagon. Is anyone really going to use a portaloo for #2s inside a station wagon that they also sleep in? Or as van they also cook in. Headroom, privacy, odour are all issues.
The other thing - you can buy/make the sticker without having a certificate ...


