Oklahoma DUI law begins with a statutory distinction that is subtle but operationally significant: Okla. Stat. tit. 47 § 11-902 creates two parallel paths to criminal liability — the per se offense, which is triggered by a measured blood alcohol concentration of 0.08 percent or above regardless of observable impairment, and the actual impairment offense, which is triggered by operating a motor vehicle "while under the influence of alcohol" to the point that their ability to drive is materially and appreciably impaired, regardless of BAC. A driver who tests 0.07 percent but who was clearly impaired — stumbling, incoherent, exhibiting nystagmus on the horizontal gaze test — can be convicted under the impairment prong of § 11-902 even without a per se BAC violation. Conversely, a driver who tests 0.09 percent but appears entirely sober to the arresting officer is subject to per se prosecution without proof of subjective impairment. In practice, DUI prosecutions in Oklahoma City, Tulsa, and rural Oklahoma counties generally rely on the combination of the chemical test result, field sobriety test performance, and the officer's observations of driving behavior to build a comprehensive case under both prongs of the statute.
Oklahoma's DUI legal landscape has a dimension that distinguishes it from most other states: the "Actual Physical Control" provision of § 11-902, which extends DUI liability to a person who is in actual physical control of a motor vehicle while under the influence — even if the vehicle is not moving and the person is not driving. An Oklahoma driver who pulls into a parking lot, parks the car, and falls asleep in the driver's seat with the keys in the ignition has placed themselves in "actual physical control" of the vehicle under Oklahoma case law interpreting § 11-902. The Oklahoma Supreme Court's interpretation of APC liability has expanded the statute's reach well beyond the typical driving scenario, creating significant exposure for persons who choose — in good faith — to sleep off alcohol intoxication in their vehicles rather than drive home. Defense attorneys in Oklahoma regularly advise clients that the APC provision makes "sleeping it off" in the driver's seat legally risky, and that moving to the backseat — or better yet, calling for transportation — provides a better defense posture.
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