Wash. Rev. Code § 43.20.149
(1) Beginning May 1, 2020, a regulatory authority must accept a completed and approved plan review of a mobile food unit from another regulatory authority if:
(b) The applicant provides the following to the regulatory authority from which the applicant is seeking a permit:
(2) Except as provided in (a) and (b) of this subsection, the regulatory authority may not require an applicant to submit any additional documents or inspections to obtain a permit to operate the mobile food unit.
(b) The regulatory authority may require an applicant to submit additional commissary agreements as required by department and state board regulations unless:
[ 2019 c 185 s 3.]