If it is impracticable for the board to determine from the records the length of service, compensation, or age of any member of this system, or if any member refuses or fails to give the board a statement of his or her state service, compensation, or age, the board may estimate the length of service, compensation, or age.
Source:
Section 9353.7, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=9353.7..