The following definitions apply to this chapter:
"Department" means the Washington state department of children, youth, and families.
"Out-of-home care" means the same as defined in RCW 13.34.030.
"Social Security Disability Income (SSDI)" means the same as defined in 42 U.S.C. § 423.
"Supplemental Security Income (SSI)" means the same as defined in 42 U.S.C. § 1381a.