Not sure, but from the article: "If the companies would like to add a carpool feature, they first have to request an adjustment to their existing permits with t

Not sure, but from the article: "If the companies would like to add a carpool feature, they first have to request an adjustment to their existing permits with the CPUC or petition the state legislature to modify the law." Presumably, the airport shuttle vans have a different type of permit than the ones Uber et al have. Seems more like a temporary paperwork issue than a genuine showstopper.