2015 ORS § 468A.030¹
When liability for violation not applicable

The several liabilities which may be imposed pursuant to ORS 448.305 (Special ordinance authority of certain cities), 454.010 (Definitions for ORS 454.010 to 454.040) to 454.040 (Determination of costs payable by users), 454.205 (Municipality defined) to 454.255 (Plans and cost estimates), 454.505 (Definitions for ORS 454.505 to 454.535) to 454.535 (Sewage Treatment Works Construction Account), 454.605 (Definitions for ORS 454.605 to 454.755) to 454.755 (Fees for certain reports on sewage disposal) and ORS chapters 468, 468A and 468B upon persons violating the provisions of any rule, standard or order of the Environmental Quality Commission pertaining to air pollution shall not be so construed as to include any violation which was caused by an act of God, war, strife, riot or other condition as to which any negligence or willful misconduct on the part of such person was not the proximate cause. [Formerly 449.825 [bad link] and then 468.300]