Upon retirement for service, the member who filed a preretirement election of an option under Section 24307 shall have his or her allowance modified by the greater of the option factor as of the effective date of the preretirement election, or the option factor at the time the member’s retirement became effective.
Source:
Section 24307.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=EDC§ionNum=24307.5..