QUEENSLAND

Drink Driving Defences QLD

In shortQueensland drink driving charges are hard to defend because a breath certificate taken within 3 hours is conclusive evidence of your reading. You can only displace it by proving the instrument was defective or not properly operated, and you must give 14 days' written notice first. Other challenges target whether you were driving, the lawfulness of police conduct, and timing.

Breath and blood evidence: conclusive if taken within 3 hours, unless you prove the instrument was defective or not properly operated, or the lab result was wrong (TORUM s 80(15G), (15H), (16G)).
Notice: you must give the prosecution at least 14 days' written notice before leading that evidence (s 80(26)).
Other issues: identity of the driver, whether you were 'in charge', the lawfulness of the test, and the court's discretion to exclude unlawfully obtained evidence (Bunning v Cross).

Queensland law · law checked 23 Oct 2026

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What's on this page

Can you defend a drink driving charge in Queensland?

Yes, but the law makes it difficult. Section 80 of the Transport Operations (Road Use Management) Act 1995 (TORUM) gives breath and blood test certificates special evidential weight, and section 79(12) removes one of the usual criminal defences. The prosecution still has to prove each element of the charge: that you were driving or in charge of the vehicle, on a road or public place, and that your reading was over the limit that applied to you. A defence usually means attacking one of those elements, or the evidence used to prove it.

This page explains the main avenues. Whether any of them is available depends on the brief of evidence, which a lawyer should review before you plead.

Breath analysis certificates: how conclusive are they?

Under s 80(15G), evidence of the reading from a breath analysing instrument, including the certificate, is conclusive evidence of the concentration of alcohol in your breath:

at the time of the analysis; and
at the time of driving (the "material time"), if the analysis was done not more than 3 hours after it, and at all times in between.

The word "conclusive" is important. It means the court must accept the reading unless you prove, under s 80(15H), that at the time of the test the instrument was defective or was not properly operated. The same approach applies to laboratory tests of blood (s 80(16F), (16FA)), which can be displaced only by proving the result was not a correct result (s 80(16G)).

Challenging a defective or improperly operated breathalyser

To use s 80(15H) you need evidence, not suspicion. That can include:

calibration and maintenance records for the instrument;
the operator's authorisation and training;
whether the operating procedure was followed, such as observation periods and mouth alcohol checks; and
independent technical evidence.

You must give notice. If you intend to lead evidence that the instrument was defective or not properly operated, or that a laboratory result or certificate was not correct, you must give the prosecution written notice at least 14 days before the hearing (s 80(26)). Without that notice, the court can refuse to hear the evidence.

Queensland penalty changes in 2026: check your offence date (law checked 20 Oct 2026).

Offences on or after 31 August 2026: higher maximum fines apply. They are 20 penalty units ($3,454) for the general alcohol limit and no alcohol limit offences, 28 ($4,835.60) for the middle alcohol limit and 40 ($6,908) for driving under the influence of liquor or a drug. A first general alcohol limit conviction (0.05 to under 0.10) on an open licence now carries 2 to 9 months' disqualification. For offences before 31 August 2026 it was 1 to 9 months. Police can now give an eligible first low-range driver on an open Queensland licence an infringement notice of $1,295 instead of a court charge. Unless the driver elects to go to court, a 2-month disqualification follows. It counts as a conviction, and there is no work licence for that period. Drug driving (a relevant drug present) has not changed yet. The maximum is 14 penalty units ($2,417.80) or 3 months, with 1 to 9 months' disqualification on an open licence and 3 to 9 months for learner, P-plate and unlicensed drivers.

Offences on or after 1 December 2026: minimum fines start for drink and drug driving. For example, the minimum is 7.5 penalty units for low range and for drug driving. The drug driving maximum rises to 28 penalty units, and a first offence on an open licence carries 2 to 9 months' disqualification. A new offence of driving with a relevant drug present while over an alcohol limit adds 1 month to the disqualification range.

An offence committed before a change is generally dealt with under the penalties in force when it happened. Sources: TORUM ss 78E, 79, 79B, 79H–79J and 86, as amended by the Queensland Community Safety Act 2024 and the Transport and Other Legislation Amendment Act 2026. Penalty unit $172.70 from 1 July 2026.

The "3-hour rule"

Sections 80(15G) and 80(16FA) are often called the 3-hour rule. If the breath analysis or blood specimen was taken within 3 hours of driving, the result is treated as your reading at the time of driving. If the analysis was more than 3 hours later, the deeming does not apply and the prosecution has to prove the reading at the time of driving some other way, which can be harder.

People often ask about drinking after driving but before the test. Because the s 80(15G) evidence is conclusive "subject to subsection (15H)" only, post-driving drinking within the 3-hour window is not an easy answer to the charge. It may still be relevant to the facts and to sentence, and it can be relevant where the timing of driving is in dispute. Get advice on your facts.

Unlawful police procedure and excluding evidence

Police powers to stop, breath test and require a specimen are set out in s 80. If police did not follow those requirements, the evidence may be challenged. Evidence obtained unlawfully is not automatically excluded. Under Bunning v Cross (1978) 141 CLR 54, the court has a discretion to exclude it, weighing the public interest in convicting offenders against the unfairness of using evidence obtained improperly. Relevant matters include whether the breach was deliberate or reckless, how serious it was, and how probative the evidence is.

Were you driving or "in charge"?

The prosecution must prove you were driving, attempting to drive, or in charge of the vehicle. Identity is sometimes disputed where nobody saw who was driving. Being "in charge" has its own rules, including a statutory presumption for a person in the driver's seat and a defence in some circumstances. See in charge of a vehicle while under the influence.

Criminal Code defences

The general defences in chapter 5 of the Criminal Code 1899 can apply to TORUM offences, but they rarely succeed in drink driving cases:

Criminal Code	Defence	Notes for drink driving
s 23	Accident and unwilled acts	Rarely relevant to the act of driving.
s 24	Mistake of fact	Does not apply to offences under s 79 (s 79(12)). A belief that you were under the limit is not a defence.
s 25	Extraordinary emergency	Possible only in genuinely sudden, extraordinary emergencies, assessed strictly.
s 27	Insanity	Exceptional.
s 28	Intoxication	Involuntary intoxication can be relevant in limited situations, for example if your drink was spiked without your knowledge.
s 31	Compulsion	Requires threats or compulsion of the kind the section describes.

Repeat offences and mandatory jail

A defence matters more if you have recent previous convictions. For a third under the influence-type offence where the two earlier convictions within 5 years were for listed offences, the court must impose imprisonment as the whole or part of the punishment (s 79(1C)). The 5 years is counted back from the date of the conviction, not the date of the offence. Courts can suspend a term of imprisonment in some cases.

Defending versus pleading guilty

If there is no viable defence, an early plea of guilty is a mitigating factor at sentence. Material about your character, your need for a licence and steps you have taken, such as a traffic offenders program, can affect where in the range the penalty falls. See drink driving penalties in Queensland.

Getting advice on a defence

A defence depends on the evidence. A lawyer can request the brief, check the instrument records and the procedure followed, give any required s 80(26) notice in time, and advise you whether to plead not guilty.

Call 1300 941 900 or make an enquiry about legal representation.

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FAQs: drink driving defences in Queensland

Is it possible to defend a drink driving charge in Queensland?

Yes, but the breath certificate is conclusive unless you prove the instrument was defective or not properly operated. Other defences target whether you were driving, the lawfulness of the procedure, or timing.

What is the 3-hour rule in Queensland?

If the test was within 3 hours of driving, the result is treated as your reading at the time of driving (s 80(15G)). After 3 hours, the prosecution loses that presumption.

How much notice do I have to give to challenge the breath test?

At least 14 days' written notice to the prosecution (s 80(26)).

Can police mistakes help my case?

Possibly. Unlawfully obtained evidence can be excluded under the Bunning v Cross discretion, but exclusion is not automatic.

Is believing I was under the limit a defence?

No. Mistake of fact under Criminal Code s 24 does not apply to s 79 offences.

What should I do if I'm charged with drink driving?

Get legal advice before your first court date, so the evidence can be reviewed and any notice deadlines met.

Sources and date checked

The law on this page was checked against these primary and official sources on 23 Oct 2026. Penalty unit dollar amounts are as at 23 Oct 2026.

Transport Operations (Road Use Management) Act 1995 (Qld) – ss 79, 80 (reprint current from 21 September 2026) — checked 23 Oct 2026
Criminal Code 1899 (Qld) – ch 5 (criminal responsibility), ss 23–31 — checked 23 Oct 2026
Bunning v Cross (1978) 141 CLR 54 — checked 23 Oct 2026
Queensland Community Safety Act 2024 (Act No. 45), ss 93–104 – TORUM amendments commenced 31 August 2026 — checked 20 Oct 2026
Transport and Other Legislation Amendment Act 2026 (Act No. 23) – assent 21 September 2026; pt 10 div 3 commences 1 December 2026 — checked 20 Oct 2026
TORUM legislative history (commencement of amending Acts) — checked 20 Oct 2026

This page is general information about Queensland law only. It is not legal advice. Every matter turns on its own facts.

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