Expert or opinion testimony and testimony based on economic or statistical data—Effect of noncompliance with WAC 363-11-470 or 363-11-480.
Whenever the manner of introduction of opinion or expert testimony is governed by requirements fixed under the provisions of WAC 363-11-470 or 363-11-480, such testimony not submitted in accordance with the relevant requirements shall not be received in evidence in the absence of a clear showing that the offering party had good cause for his failure to conform to such requirements.