Section 19257.5 Of Article 1. General From California Government Code >> Division 5. >> Title 2. >> Part 2. >> Chapter 6. >> Article 1.

. Where the appointment of an employee has been made and accepted in good faith, but where the appointment would not have been made but for some mistake of law or fact that if known to the parties would have rendered the appointment unlawful when made, the department may declare the appointment void from the beginning if the action is taken within one year after the appointment.