There may be as many sessions of a superior court, at the same time, as there are judges elected, appointed or assigned thereto. The judgments, orders, and proceedings of any session of a superior court, held by any one or more of the judges sitting therein, shall be equally effectual as though all the judges of said court presided at such session.
Source:
Section 69741.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=69741.5..