Elections Code section 15651
(a)
If at any election, except as provided in subdivision (b) and an election for Governor or Lieutenant Governor, two or more persons receive an equal and the highest number of votes for an office to be voted for in more than one county, the Secretary of State shall forthwith summon the candidates who have received the tie votes, whether upon the canvass of the returns by the Secretary of State or upon recount by a court, to appear before him or her at the Secretary of State’s office at the State Capitol at a time to be designated by him or her. The Secretary of State shall at that time and place determine the tie by lot. Except as provided in subdivision (b), in the same manner, at a time and place designated by it, the election board shall determine a tie vote, whether upon the canvass of the returns by the election board or upon a recount by a court, for candidates voted for wholly within one county or city.(b)
In lieu of resolving a tie vote by lot as provided in subdivision (a), the legislative body of any county, city, or special district not subject to the Uniform District Election Law (Part 4 (commencing with Section 10500) of Division 10) may resolve a tie vote by the conduct of a special runoff election involving those candidates who received an equal number of votes and the highest number of votes.
Source:
Section 15651, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=ELEC§ionNum=15651.
(accessed May 14, 2025).