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In an earnings call this week, Tesla

CEO Elon Musk teased an expansion of his company’s fledgling robotaxi service to the San Francisco Bay Area and other U.S. markets.

But California regulators are making clear that Tesla is not authorized to carry passengers on public roads in autonomous vehicles and would require a human driver in control at all times.

“Tesla is not allowed to test or transport the public (paid or unpaid) in an AV with or without a driver,” the California Public Utilities Commission told CNBC in an email on Friday. “Tesla is allowed to transport the public (paid or unpaid) in a non-AV, which, of course, would have a driver.”