Cal. Penal Code § 4852.06

After the expiration of the minimum period of rehabilitation applicable to him or her and after the termination of parole, probation, postrelease supervision, or mandatory supervision, a person who has complied with the requirements of Section 4852.05 may file in the superior court of the county in which he or she then resides a petition for ascertainment and declaration of the fact of his or her rehabilitation and of matters incident thereto, and for a certificate of rehabilitation under this chapter. A petition shall not be filed until and unless the petitioner has continuously resided in this state, after leaving prison or jail, for a period of not less than five years immediately preceding the date of filing the petition.