While the laws vary in each state for impaired driving, Oklahoma has several laws that define alcohol/drug-related driving offenses:

Driving While Impaired (DWI)
A person is driving while impaired when there is evidence that there was, at the time of the test, an alcohol concentration in excess of five-hundredths (0.05) but less than eight-hundredths (0.08). However, no person shall be convicted of driving while impaired in the absence of additional evidence that the person’s ability to operate such vehicle was affected by alcohol to the extent that the public health and safety was threatened or that the person had violated a state statute or local ordinance in the operation of the motor vehicle

Driving Under the Influence (DUI)
A person is driving under the influence when they drive, operate, or are in actual physical control of a motor vehicle within this state, whether upon public roads, highways, streets, turnpikes, other public places or upon any private road, street, alley or lane which provides access to one or more single or multi-family dwellings, who:

• Has a blood or breath alcohol concentration, as defined in 47 O.S. § 756, of eight-hundredths (0.08) or more at the time of a test of such person’s blood or breath administered within two (2) hours after the arrest of such person;
• Is under the influence of alcohol;
• Has any amount of a Schedule I chemical or controlled substance, as defined in 63 O.S. §2-204, or one of its metabolites or analogs in the person’s blood, saliva, urine or any other bodily fluid at the time of a test of such person’s blood, saliva, urine or any other bodily fluid administered within two (2) hours after the arrest of such person;
• Is under the influence of any intoxicating substance other than alcohol which may render such person incapable of safely driving or operating a motor vehicle; or
• Is under the combined influence of alcohol and any other intoxicating substance which may render such person incapable of safely driving or operating a motor vehicle.

The fact that any person is or has been lawfully entitled to use alcohol or a controlled dangerous substance or any other intoxicating substance shall not constitute a defense against any charge of driving under the influence.

Driving Under the Influence (DUI) Under 21
A person under the age of 21 is driving under the influence when they drive, operate, or are in actual physical control of a motor vehicle within this state who:

• Has any measurable quantity of alcohol in the person’s blood or breath at the time of a test administered within two (2) hours after an arrest of the person;
• Exhibits evidence of being under the influence of any other intoxicating substance as shown by analysis of a specimen of the person’s blood, breath, saliva, or urine in accordance with the provisions of 47 O.S. § 752 and 47 O.S. § 759; or
• Exhibits evidence of the combined influence of alcohol and any other intoxicating substance.

Aggravated Driving Under the Influence
Any person who is convicted of a violation of driving under the influence with a blood or breath alcohol concentration of fifteen-hundredths (0.15) or more is guilty of aggravated driving under the influence.

Child Endangerment
A person who is the parent, guardian, or person having custody or control over a child as defined in 10A O.S. § 1-1-105, commits child endangerment when the person:

• Knowingly permits a child to be present in a vehicle when the person knows or should have known that the operator of the vehicle is impaired by or is under the influence of alcohol or another intoxicating substance; or
• Is the driver, operator, or person in physical control of a vehicle in violation of 47 O.S. § 11-902 while transporting or having in the vehicle such child or children.

However, it is an affirmative defense to this paragraph if the person had a reasonable apprehension that any action to deny permission for the child to be in the vehicle with an intoxicated person would result in substantial bodily harm to the person or the child.

In Oklahoma, being arrested for drunk driving can cost more than $10,000 in fines and fees. 

In addition, Oklahoma laws require that any driver convicted of driving under the influence (DUI) or in actual physical control of a motor vehicle, aggravated DUI, with a blood alcohol content of 0.15 or higher, must install an ignition interlock device on every vehicle they own or which is registered to them.

As a result of conviction, an interlock will be required for 18 months for first-time offenders; second-time offenders will be required to use an interlock for four years if their BAC exceeds .08. Any additional DUI convictions will result in the use of an interlock for five years.

License revocation is another penalty for impaired driving in Oklahoma. If an impaired driver fails or refuses a breath test, their license is confiscated immediately. The driver can request a hearing to challenge the ruling, but, if unsuccessful, their license will be suspended for a minimum of six months.

Sentencing can also occur after a trial or plea agreement. For a first felony, drunk drivers can expect 1-5 years of jail time, fines of up to $2,500 and a 1-year revocation of their license, if the license was previously revoked within the last 10 years. 

Second and subsequent charges carry 1-10 years of jail time, fines of up to $5,000 and an automatic 3-year or longer revocation of their license, if the license had been revoked 2 or more times in the past 10 years. 

As part of the Drunk Driving Prevention Act, Oklahoma’s strict zero tolerance law makes underage drinking and driving a criminal offense. A conviction or deferred sentence for any of the following will result in license revocation and mandatory interlock:

• Any amount of alcohol found in the system of a driver under 21
• A person under 21 can be charged with a misdemeanor punishable by up to 10 days in jail and/or $1000 fine for their refusal to take a test.
• A first drug or alcohol offense, including possession, use or abuse committed by anyone under 18
• Misrepresenting one’s age to obtain alcohol by anyone under 21

Social Hosts
In addition, Oklahoma has a Social Host Law, which puts the responsibility for underage drinking on the person providing the location for the gathering. If people under 21 are gathered and drinking on private property, the person who provides the location is considered the Social Host and will be held accountable.

A “Social Host” can be a minor or adult and does not have to be physically present or the actual property owner. These Social Host violations carry a first-time fine of up to $500. 

If someone is injured or killed because of a Social Host violation, the host can be charged with a felony, punishable by up to five years in prison and a fine up to $2,500. Fines and penalties increase with additional violations.