Wash. Rev. Code § 39.19.260
(1) The director or director's designee may apply for and obtain a superior court order approving and authorizing a subpoena in advance of its issuance. The application may be made in the county where the subpoenaed person resides or is found, or the county where the subpoenaed documents, records, or evidence are located, or in Thurston county. The application must:
[ 2021 c 160 s 5.]