Defendant was convicted of assault in the second degree. ORS 163.175. Imposition of sentence was suspended, and he was placed on probation subject to special conditions, including:

“5. Defendant shall submit to any body substance tests and/or polygraph (at defendant’s own expense) which may be requested by probation officer to determine compliance with Special Condition #2 * * *; any refusal is a violation of probation.”

Condition 2 prohibits the consumption of alcoholic beverages. Defendant argues that the trial court lacked authority under ORS 137.540(2) 1 to impose condition 5 without a requirement that the probation officer have reasonable grounds to suspect that he had violated condition 2. The state concedes that condition 5 does not comply with ORS 137.540(2), but argues that defendant did not preserve the error in the trial court. See State v. Mortimore, 94 Or App 179, 764 P2d 960 (1988). Because it is apparent on the face of the record that the trial court acted beyond its authority when it required defendant to submit unconditionally to blood alcohol tests, we vacate condition 5. ORAP 5.45(2).

Conviction affirmed; probation condition 5 vacated; remanded for resentencing.