Or. Admin. R. 115-060-0020
The showing of interest submitted pursuant to OAR 115-060-0010(1) and (3) shall not be furnished to any of the parties. The Board or its agents shall determine the adequacy of the showing of interest and such decision shall not be subject to collateral attack.
ORS 243
ORS 663.025
ERB 1-1980, f. & ef. 1-9-80