California Code, Health and Safety Code - HSC § 103300

(a) Notwithstanding other provisions in this part relative to amendment of a record, if the information originally furnished in the medical and health data section of a record of death, fetal death, or live birth is modified by supplemental information relative thereto, the certifying physician, nurse practitioner, or coroner having knowledge of this information may make a declaration, as provided in Section 2015.5 of the Code of Civil Procedure, stating the changes are necessary to make the information correct and file the declaration with the state or local registrar.

(b) This section shall become operative on July 1, 2026.