For the purposes of WACs 388-70-091, 388-70-092, 388-70-093, 388-70-095, 388-70-450, and 388-70-600 through 388-70-640, the term "Indian child" is defined as any unmarried and unemancipated Indian person who is under age eighteen and is one of the following:
Wash. Admin. Code § 388-70-091
Order 1167, § 388-70-091, filed 10/27/76.