I have an Austrian Licence and attempted to get a ZUP - the Gov't guys responsible for my region (bavaria) told me over the phone they do not issue ZUP's for non-german licences and that i wouldn't need one to rent an aircraft. Now there are different kind of ZUP's -> You would need one for working at an airport or for an air carrier, but the one specifically for "Luftfahrer" (Pilots) is only issued to LBA licence holders - It other words, a ZUP for "Luftfahrer" is attached to the licence, not the person.