DUI-D: Driving Under The Influence Of Marijuana

In November of 2012 with Initiative 502, Washington State residents voted to legalize marijuana. Though the crime of DUI has always encompassed legal and illegal drugs, prior to December 6, 2012, there was never an equivalent threshold limit for drugs like the 0.08 limit with alcohol. The standard was whether the driver was affected by the level of the drug in their blood.

In 2012, the "New Approach" initiative was brokered with a specific eye on marijuana due to the recent legalization of it. The initiative lawyers very openly admitted the new law was required to address DUI, hence it became known as DUI-Drug (or DUI-D or sometimes even DUI-M for marijuana).

The legalization and regulations of marijuana creates and affects numerous statutes, however the following are the important DUI statutes that have been amended, re-written and created, and what it all means for the licensed driver.

The Intention of the Law

What it Means

Ironically, with the passage of I-502, the real focus is now on DUI-D crimes which are not property or violent crimes, and the new threshold is nowhere near a limit that has ever established evidence of actual impairment. The irony is in the fact that the legislative intent and preamble (and pre-vote rhetoric also) states goals of "education, health care, research, and substance abuse prevention," yet, the new law creates a false threshold level thereby perpetuating the very myths they goals seek to eliminate.

THC Limit Defined

RCW 46.04.586

With the creation of this new law, the definition of the threshold limit was written as follows:

What it Means

First, a limit had to be set (5.00ng), then they needed to define it in terms of measurement, which therefore gives us the definition of THC. Once this was done, the statute simply incorporated the terms into the current DUI-Alcohol laws.

RCW 46.20.308

As with most laws, this one has evolved since 2012. The original language piggybacked on the DUI alcohol statue. Many drivers are NOT aware of this VERY important statute prior to the amendment and with the new amendment, it has become even more powerful and dangerous to the regular marijuana user, regardless of the method of ingestion, if they rely on their personal driver's license and even more devastating to the Commercial Driver License (CDL) holder. 

This statute is known as the "Implied Consent" Law. Essentially, this is an "implied" agreement between a driver and the State, that the majority of drivers have no idea that they have agreed to this by holding a Washington Driver's License. This is the statute that allows the Department of Licensing (DoL) to take action against a driver and their license BEFORE any court action. 

The History of the Law

After December 6, 2012, but before September 28, 2013, this statute applied equally to Alcohol and THC levels. It was created first for the .08 BAC laws, then incorporated THC levels and identical consequences as alcohol. The statute stated:

What it Meant

You had agreed to give a sample of breath or blood if stopped and arrested for DUI or DUI-D, but you are permitted to withdraw this previously given consent, BUT IF YOU DO, the police officer can quickly apply for an obtain a warrant from a Judge. This will then override your refusal and compel you to produce the sample. This will be done with or without your cooperation.

The Rewrite

The most fascinating aspect of DUI defense is how quickly the law changes. On September 28, 2013, this statute above was re-drafted as a result of the United States Supreme Court ruling that warrantless blood draws violated a driver's 4th Amendment Right to be free of unreasonable search and seizure. As a result, the Washington legislature saw the need to respond with a new law that reads as follows:

What it Means Now

If, following his or her arrest and receipt of warnings under subsection (2) of this section, the person arrested refuses upon the request of a law enforcement officer to submit to a test or tests of his or her breath, no test shall be given except as authorized by a search warrant.

Finally, the era of forced searches has come to an end and the search of a DUI suspect has as much protection as everyone sought to be searched.

DoL License Suspension

RCW 46.20.3101

The above consequences described above don't end there, as the statute further states that you can refuse but:

Conversely, if a driver does take the test, there are also serious consequences depending on the amount of THC found in the blood along with the age of the driver. When a refusal happens, if the police seek and obtain a search warrant your blood can still be drawn against your will.

21 and Over

Under 21

What this Means

As you can see there is a threshold limit for minors and alcohol — .02 BAC — and there is a threshold limit for adults  — .08 BAC for alcohol and 5.00 ng for THC — but when it comes to minors and pot, there is no similar threshold as it is ZERO TOLERANCE. This is an interesting paradox because there is no impairment at the 5.00 ng limit for over 21, yet there is zero tolerance for under 21 DUI-D levels. Apparently, the focus on drug education under the "New Approach" is not concerned with those under 21 and it appears as if some "morality" has slipped into the rational if there ever was such a rationale.

Continuing on into the consequences of the new approach limits, if there is a license suspension due to a THC test or refusal, a person will be able to continue driving if they choose too but they will need an Ignition Interlock Driver's License (IIL) during this time. Again you can see the folly of the new approach sanctions. The Ignition Interlock Device (IID) and companion license detect alcohol only and NOT drugs of any kind, yet a DUI-D pot suspension will require an alcohol-monitoring device on your car. The rational connection between the purpose of the law and the consequences under the law once more are shown to be non-existent.

Refusal of Blood Test

Staying with the license consequences from the DoL before any criminal consequences are imposed are such that the consequences of a refusal to provide a breath or blood test from the Department of Licensing (separate and at in most instances BEFORE the criminal sanctions):

What this Means

A first refusal means a one-year suspension and a second or subsequent refusal within seven years means a two-year suspension.

An IID is available for those who are revoked under this statute just like those suspended for 90 days.

Blood Sample Provided

21 and Over

If you give a blood sample and you are over 21 years old AND the THC concentration of the person's blood was 5.00ng or more:

Under 21

In the case of an incident where a person under age 21 has submitted to blood AND the THC concentration of the person's blood was above 0.00:

If there are criminal charges that follow — and there usually are — that result in a conviction for DUI-D, there are additional suspensions and revocations. However, if the driver suffers a DoL sanction and then a criminal suspension follows, the DoL shall grant credit on a day-for-day basis for any portion of a suspension, revocation, or denial already served under this section for a suspension, revocation, or denial imposed arising out of the same incident.

Adult DUI-D and Physical Control-Drugs

RCW 46.61.502 & RCW 46.61.504

These are the statutes that define a DUI and Physical Control, and it adds and incorporates the THC language along with the standard and historical DUI-Alcohol language and elements.


A DUI-D occurs when a person is driving and then stopped, and is guilty of driving while under the influence of marijuana, or any drug if:

Physical Control-D

A Physical Control-D occurs where driving may have occurred, but at the time of police contact with the person, there is no driving — meaning the vehicle is not moving. A person is guilty of physical control of a motor vehicle while under the influence of marijuana, or any drug if:

What follows applies to both statutes above equally:

  • The fact that a person charged is or has been entitled to use a drug under the laws of this state shall not constitute a defense against a charge of violating this section.
  • It is an affirmative defense, which the defendant must prove by a preponderance of the evidence, that the defendant consumed a sufficient quantity of marijuana after the time of driving and before the administration of an analysis of the person's blood to cause the defendant's THC concentration to be 5.00 or more within two hours after driving.
  • Analyses of blood samples obtained more than two hours after the alleged driving may be used as evidence that within two hours of the alleged driving, a person had a THC concentration of 5.00 or more and in any case in which the analysis shows a THC concentration above 0.00 may be used as evidence that a person was under the influence of or affected by marijuana.

There is no distinction between an Alcohol DUI and a Drug DUI conviction for purposes of prior offenses. A DUI is a DUI no matter what the basis of the conviction is and thus the statutes regarding felony DUI and other priors and the sections remain unchanged.

Minor DUI-D: Zero Tolerance for THC

RCW 46.61.503

As mentioned above, the law with respect to under age 21 is zero tolerance (0.0ng) when it comes to THC, unlike the under 21 alcohol limit of .02. The statute reads:

What it Means

Fortunately, with the addition of zero tolerance for Minor DUI-D, there was no change in the seriousness of the crime as it remains a misdemeanor. If the limits are over 0.0ng and less than 5.0ng, it will simply stay a minor DUI. However, minors found with 5.0ng or more in their bloodstream will likely be charged under the adult DUI statute, as this is the case with alcohol when the minor is over 0.02 and over 0.08. Being under age 21 does not save you from the more serious charge when you are over that adult limit.

Mandatory Appearance When Arrested & Charged DUI-D

RCW 46.61.50571

Mandatory appearance has always been the case for DUI-Alcohol, and this statute was updated to incorporate DUI-D arrests as well. When charged with a DUI, Physical Control or Minor DUI and you are provided an actual ticket, citation, or complaint at the time of the arrest and the Court rules require a first appearance before a judicial officer within one judicial day after the arrest. Traditionally, the Minor DUI arrests could be waived, however, this statute, in adding DUI-D THC arrests, states that:

Perhaps the trend of waiving arraignment will cease when judges and prosecutors revisit this statute as I have.

Admissibility: THC Blood Results

RCW 46.61.506

The blanket admission of breath tests with a limited showing of the ticket having printed was the new standard after a prior legislative fix and a Washington Supreme Court Review in the case of City of Fircrest v. Jensen. The statute remains unaffected on this issue, only now it permits the admission of the test for THC concentration.

There is no reason to believe that the statute on admission will be applied any differently than the breath test results, except for the fact that the blood testing procedure (Chromatography) is much more involved and open to contamination.

This statute is the same standard for admissibility of the blood test at a criminal trial or at a civil procedure DoL level when they are determining whether to take action against your license due to an arrest.

The statute now reads as follows (italics indicate new information):

I have always been fond of saying that this statute allows anything that is printed by the breath test machine, and now with the addition of the THC limits, the statue will pretty much allow for admission of a blood test that is also printed at the end of a very complex analyses called "Chromatography". A blood test analyses for THC uses a different instrument called Mass Spectrometry.

The possible errors along the way, if discovered by only the most well-trained DUI Defense lawyers, will likely be pushed aside in favor of admission. However, there is still room to expose the problems, to explain their significance, and above all even with a positive, over 5.00ng test, show that impairment is in fact not anywhere close to this new limit. But to do that, you will need the most experienced, dedicated, and knowledge DUI Defense Lawyer or Attorney at your side.