CA AB2418

Expands the definition of "Indian child" under California law to include unmarried individuals ages 18-20 who are members of or eligible for membership in an Indian tribe and are biological children of tribal members under dependency court jurisdiction.

Allows individuals ages 18-20 to elect not to be considered an Indian child for purposes of Indian child custody proceedings, with all proceedings respecting their status as legal adults.

Establishes procedures for courts to determine which tribe is the "Indian child's tribe" when a child is a member of or eligible for membership in multiple tribes, prioritizing actual membership and considering factors like reservation residence, tribal participation, and language fluency.

Maintains validity of prior court actions based on tribal designation even if the child later becomes a member of a different tribe than initially designated.