In Belgium (actually the Flemmish part of Belgium) we have a lot of restrictions. And this means a lot of interpretation.
It's forbidden to have a venomous snake, unless you have a certain permit ( not gettable in most cities, because you'd have to match a lot of conditions and eventually the persons around you and the city itself decides if you get it ). But what is a venomous snake? There is no exhaustive list anywhere. Well, let's take for example a garter snake
. So in 1 city a garter is a venomous snake in the other it isn't. Everybody will probably laugh about this, but it just an interpretation like another. Everybody knows that you can have a reaction if a garter chews on your hand for too long ( I don't know exactly what/how unless I look it up, but it does not really matter here ). That is enough to say that they are venomous for some cities.
You can believe the discussion here about poisson dart frogs
