Wash. Admin. Code § 246-10-6035
When a party contests the approval or denial of an application for a certificate of need, the evidence at hearing is limited to information and materials:
(4) Intended to clarify, explain, or correct evidence admitted under subsections (1) through (3) of this section. Evidence will be admitted under this subsection only if:
(b) The evidence relates to facts in existence prior to whichever of the following occurred last:
[Statutory Authority: RCW 43.70.040, 34.05.220, 34.05.410, 18.130.050, and 34.05.413 through 34.05.476. WSR 18-18-049, § 246-10-6035, filed 8/29/18, effective 9/29/18.]