California Code, Health and Safety Code - HSC § 103447

(1) The sworn affidavit of the administrator of the hospital where the applicant was born or by a representative designated by the administrator, verifying that the incorrect gender information entered on the birth certificate was due to a hospital error.

(2) The sworn affidavit of the representative of the local registrar, verifying that the incorrect gender information entered on the birth certificate was due to an administrative error of the local registrar.

(3) The sworn affidavit of the physician attending the birth of the applicant and the sworn affidavit of the applicant's mother or father or a relative who was at least five years old at the time of the applicant's birth, verifying that, at the time of birth, the applicant's gender was different from that indicated on the original birth certificate.