(2) When a defense, declared to be an "affirmative defense" by chapter 743, Oregon Laws 1971, is raised at a trial, the defendant has the burden of proving the defense by a preponderance of the evidence.
(3) The state is not required to negate a defense as defined in subsection (1) of this section unless it is raised by the defendant. "Raised by the defendant" means either notice in writing to the state before commencement of trial or affirmative evidence by a defense witness in the defendant’s case in chief. [1971 c.743 §4]
Note: See note under 161.015.