Wash. Admin. Code § 479-02-075
Upon receiving a request, the public records officer will respond within five business days in writing or by email acknowledging receipt of the request and with one or more of the following:
(2) An estimate of the time it will take to provide the record or a schedule for providing the records in installments, including:
[Statutory Authority: Chapter 47.26 RCW. WSR 07-18-050, § 479-02-075, filed 8/30/07, effective 9/30/07.]