When objection is made to the admissibility of evidence, such evidence may be received subject to a later ruling. The agency may, in its discretion, either with or without objection, exclude inadmissible evidence or order cumulative evidence discontinued. Parties objecting to the introduction of evidence shall state the precise grounds of such objection at the time such evidence is offered.
Wash. Admin. Code § 106-08-470
Order 3244, § 106-08-470, filed 12/8/71.