California Code, Penal Code - PEN § 832.25

(a) Notwithstanding any other provision of law, all welfare fraud investigators or inspectors who are appointed as peace officers pursuant to subdivision (a) of Section 830.35 on or after January 1, 2001, shall attend and complete a specialized investigators basic course approved by the Commission on Peace Officer Standards and Training within one year of being hired as a welfare investigator or inspector. Any welfare fraud investigator or inspector appointed prior to January 1, 2001, shall not be required to attend and complete the training required by this section, provided that he or she has been continuously employed in that capacity prior to January 1, 2001, by the county that made the appointment.

(b) Any investigator or inspector who possesses a valid basic peace officer certificate as awarded by the Commission on Peace Officer Standards and Training or who has successfully completed the regular basic course certified by the Commission on Peace Officer Standards and Training basic course within three years prior to appointment shall be exempt from the training requirements of subdivision (a).