Oregon Revised Statutes Public Health and Safety § 452.145

(1) A vector control district shall not exercise the authority granted by ORS 452.110 relating to the control or eradication of predatory animals unless the electors of the district approve a proposition referred to them by the district board that authorizes the district to assume the function of predatory animal control and eradication.

(2) When authorized to assume the function of predatory animal control and eradication by the electors of the district, a vector control district shall conduct its activities for the control and eradication of predatory animals in accordance with the provisions of ORS chapter 610.

(3) Officers and employees of a vector control district shall not enter upon any private land to inspect for or to control predatory animals unless the owner of the land first grants permission for such entry.