Or. Admin. R. 437-007-0310
All employees exposed to the potential hazard of moving lines, falling timber, logs, vehicles, machines and other moving equipment or materials must wear upper body cover and/or hard hats of a high-visibility color, that contrasts with the background color(s).
ORS 654.025(2) & 656.726(4)
ORS 654.001 - 654.295
OSHA 5-2003, f. 6-2-03, cert. ef. 12-1-03