ORS § 813.135
Any person who operates a vehicle upon premises open to the public or the highways of the state shall be deemed to have given consent to submit to field sobriety tests upon the request of a police officer for the purpose of determining if the person is under the influence of intoxicants if the police officer reasonably suspects that the person has committed the offense of driving while under the influence of intoxicants in violation of ORS 813.010 or a municipal ordinance. If the person refuses to consent to field sobriety tests, the person shall be asked to provide only physical cooperation to submit to nontestimonial field sobriety tests, and the person shall be informed of the consequences of failing to physically submit to those tests under ORS 813.136.
ORS 813.135