Last year, California Governor Gavin Newsom vetoed a wildly popular (among the public) and wildly controversial (among tech companies) bill that would have established robust safety guidelines for the development and operation of artificial intelligence models. Now he’ll have a second shot—this time with at least part of the tech industry giving him the green light. On Saturday, California lawmakers passed Senate Bill 53, a landmark piece of legislation that would require AI companies to submit to new safety tests.

Senate Bill 53 , which now awaits the governor’s signature to become law in the state, would require companies building “frontier” AI models—systems that require massive amounts of data and computing power to operate—to provide more transparency into their processes. T

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