(1) conduct which would normally constitute an offense is justifiable & not criminal when it's required or authorised by law or by a judicial decree or is performed by a public servant in the reasonable exercise of official powers, duties or functions^*

(2) as used in (1), laws and judicial decrees include but are not limited to:

(a) laws defining duties & functions of public servants

(b) laws defining duties of private citizens to assist public servants in the performance of certain of their functions

(c) laws governing the execution of legal process

(d) laws governing the military services & conduct of war AND

(e) judgments and orders of courts

^* unless inconsistent with other provisions of chapter 743, Oregon Laws 1971, defining justifiable use of physical force, or with some other provision of law