Gov. Newsom signs bill requiring schools to restrict, prohibit student cell phone use KTLA Los AngelesNew California law orders schools to develop policies to restrict student cellphone use Los Angeles TimesGovernor Newsom signs legislation to limit the use of smartphones during school hours Office of Governor Gavin NewsomGavin Newsom signs restrictions on cell phones in schools POLITICOCalifornia Schools Must Restrict Phones Under New Law Signed by Newsom The New York Times