The boundary of the city of Tübingen is the official boundary of the LEZ. Since there are two exclaves within the area, the LEZ has two holes.
It doesn't make much sense but that's the published state by Regierungspräsidium Tübingen.

In addr:postcode darf nur die PLZ stehen,
der Ortsname gehört in addr:city bzw. suburb

Vorsicht mit Leerzeichen am Ende von Zeichenketten. Nicht alle Anwendungen können damit umgehen.

geändert

Buildings (except round huts) should be rectangular with (mostly) 4 corners.
A fith corner comes from misinterpretation of gabled roof from slightly distorted imagery when taken a few degrees from the side.