Upon approval of a retail transactions and use tax at an election conducted pursuant to Chapter 3 (commencing with Section 131100) in a county with an adopted county transportation expenditure plan that includes a provision for the creation of a county transportation authority, the authority shall be created at that election.
Source:
Section 131240, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=131240..