They can show the demo car and the skateboard model (i.e. wheels and battery pack) they have in the store, and they can answer technical questions about the car

They can show the demo car and the skateboard model (i.e. wheels and battery pack) they have in the store, and they can answer technical questions about the car, but they are not allowed to discuss prices with anyone nor are they allowed to facilitate the purchase. There are further frustrating restrictions in Texas around the service of vehicles. The Tesla service center cannot directly handle a request for service. The customer must call a department in California and make arrangements with them, then that department forwards the request to the Texas service center. This information is based on what I remember of reading various posts in the teslamotorsclub.com forums.