California Code, Evidence Code - EVID § 1311

(a) Subject to subdivision (b), evidence of a statement concerning the birth, marriage, divorce, death, parent and child relationship, race, ancestry, relationship by blood or marriage, or other similar fact of the family history of a person other than the declarant is not made inadmissible by the hearsay rule if the declarant is unavailable as a witness and:

(b) Evidence of a statement is inadmissible under this section if the statement was made under circumstances such as to indicate its lack of trustworthiness.