Or. Admin. R. 141-071-0625
All production shall be maintained segregated until an approved system of measurement has accounted for the quantity and quality of the leased minerals. Approval may be obtained to commingle production upon proof that royalty payable to the state shall not be diminished.
ORS 273
ORS 273.780 - 273.790
LB 44, f. & ef. 8-16-77