Expression of views not containing threats or promises of benefit not unfair labor practice. The expressing of any views, argument or opinion, or the dissemination thereof, whether in written, printed, graphic or visual form, does not constitute evidence of an unfair labor practice under any of the provisions of this chapter, if the expression contains no threat of reprisal or force or promise of benefit. [1971 c.729 §16]

ORS 663.160 — under Chapter 663.