82.1031.  Affirmative defense, when. — If a property owner sued under section 82.1025 and sections 82.1027 to 82.1030 pleads and proves that a condition alleged by the plaintiff to be a nuisance is the subject matter of an order issued by the state department of natural resources, the United States Environmental Protection Agency, or the office of the Missouri attorney general, and further pleads and proves that the property is in compliance with such order with respect to such condition, such proof shall be an affirmative defense to plaintiff's claim that such condition is subject to one or more of the remedies provided for under section 82.1025 and sections 82.1027 to 82.1030.