Wash. Rev. Code § 74.12.350
The department of social and health services is hereby authorized to promulgate rules and regulations in conformity with the provisions of Public Law 87-543 to allow all or any portion of a dependent child's earned or other income to be set aside for the identifiable future needs of the dependent child which will make possible the realization of the child's maximum potential as an independent and useful citizen.
The transfer into, or accumulation of, a child's income or resources in an irrevocable trust account is hereby allowed. The amount allowable is four thousand dollars. The department will provide income assistance recipients with clear and simple information on how to set up educational accounts, including how to assure that the accounts comply with federal law by being adequately earmarked for future educational use, and are irrevocable.
RCW 74.12.350
Intent-Finding-Severability-Conflict with federal requirements-1994 c 299: See notes following RCW 74.12.400.