Oregon Revised Statutes Public Health and Safety § 468B.210

(1) All permits for confined animal feeding operations issued under ORS 468B.050 shall specify the maximum number of animals that may be housed at the facility.

(2) The maximum number of animals specified in a permit shall be determined for each facility on the basis of the capacity of the particular confined animal feeding operation to contain, treat, hold and dispose of wastes as necessary to comply with all conditions of the permit.

(3) Any confined animal feeding operation that exceeds by more than 10 percent or 25 animals, whichever is greater, the maximum number of animals specified in its permit shall be considered in violation of the permit and the owner or operator shall be subject to enforcement action under ORS 468.140 or 468.943.