Cal. Educ. Code § 48645.5

Each public school district and county office of education shall accept for credit full or partial coursework satisfactorily completed by a pupil while attending a public school, juvenile court school, or nonpublic, nonsectarian school or agency. The coursework shall be transferred by means of the standard state transcript. If a pupil completes the graduation requirements of his or her school district of residence while being detained, the school district of residence shall issue to the pupil a diploma from the school the pupil last attended before detention or in the alternative, the county superintendent of schools may issue the diploma.