Not later than the 10th day after the commencement of his term of office and before entering upon the discharge of his official duties, each director shall take and file his oath of office pursuant to Sections 1360 and 1363 of the Government Code.
Source:
Section 101106, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=101106..