Or. Admin. R. 137-090-0050
As used in these rules, reasonable grounds means reasonable suspicion. Reasonable suspicion is suspicion that is reasonable under the totality of the circumstances. It is less than probable cause and more than mere suspicion.
ORS 180
ORS 180.610(2), (3) & (4)
JD 2-1989, f. & cert. ef. 9-13-89