Public Utilities Code section 131102
(a)
A retail transactions and use tax ordinance for a tax of either one-half of 1 percent or 1 percent applicable in the incorporated and unincorporated territory of a county may be imposed by a county transportation authority or the commission in the manner prescribed in Section 131103 and Part 1.6 (commencing with Section 7251) of Division 2 of the Revenue and Taxation Code, if two-thirds of the electors voting on the measure vote to approve its imposition at an election which shall be called for this purpose by the board of supervisors within one year after the adoption of a county transportation expenditure plan.
Source:
Section 131102, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=131102.
(accessed May 4, 2025).