Best is when you call the Veterinäramt Zürich. They can tell you what you need to do for getting this documents.
You have to have a finishes Terrarium with plants and everything else a Chamäleon needs. They'll come to your home and look what it's like. Temperature, Size, Air, Plants everything thats given by law. Also they want to know if you looked up some things about these animals. You have to know where they come from, natural habit and so on. They'll tell you everything you need to know!
Hope I helped you even if my english is not the best.
Man kann auch aus dem Rahmen fallen wenn man garnie im Bilde war .