Tesla on ICEd Superchargers:
On the southbound side, a nonelectric Saab 9-5 was occupying one of two spaces marked with signs reserving them for people charging the Model S, the only car able to use the stations. “We can’t forbid nonelectrics from using the parking spaces,” Shanna Hendriks, a Tesla spokeswoman, said. “We can only hope that people respect the signs.”
Tesla Begins East Coast Fast-Charging Corridor - NYTimes.com
I assume the Tesla spokeswoman was specifically referring to Conneticut. Other states have laws prohibiting gasoline vehicles from parking in EV parking spaces.
I also find it difficult to believe that if a firm has arranged for private parking that they couldn't enforce towing of violating vehicle regardless if they were EVs or ICEs. I guess it really depends on the terms of use that Tesla has negotiated with the site host.
Larry