Wash. Rev. Code § 41.05.730
(2) A provider is eligible for supplemental reimbursement only if the provider has all of the following characteristics continuously during a state fiscal year:
(3) An eligible provider's supplemental reimbursement pursuant to this section must be calculated and paid as follows:
(4)
(5) Participation in the program by an eligible provider described in this section is voluntary. If an applicable governmental entity elects to seek supplemental reimbursement pursuant to this section on behalf of an eligible provider owned or operated by the entity, as described in subsection (2)(c) of this section, the governmental entity shall do all of the following:
(6) The department shall promptly seek any necessary federal approvals for the implementation of this section. The department may limit the program to those costs that are allowable expenditures under Title XIX of the federal social security act (42 U.S.C. Sec. 1396 et seq.). If federal approval is not obtained for implementation of this section, this section may not be implemented.
[ 2015 c 147 s 1.]