NEW SOUTH WALES

Alcohol Interlock Laws NSW

In shortIn NSW, a court must make a mandatory interlock order for middle and high range PCA, DUI alcohol, refusal offences, combined alcohol and drug offences, and repeat lower range offences within 5 years. You serve a shorter disqualification, then drive only an interlock-fitted vehicle for at least 12, 24 or 48 months. Exemptions are narrow.

  • Mandatory: the order is set by the Road Transport Act 2013 s 211 Table; the court sets the disqualification within the minimum and maximum.
  • Exemptions: no access to a vehicle, or a diagnosed medical condition; severe hardship only for a first middle range or first s 111A(2) offence (s 212).
  • Refusing: no normal licence for 5 years from conviction unless the minimum interlock period is completed (s 211(1)(b)).

New South Wales law · law checked 21 Oct 2026

What's on this page

The History: Alcohol Interlock Laws NSW Explained

On 8 September 2003 the NSW Alcohol Interlock Program was first introduced. At that stage it was largely an alternative penalty available to the Court: the Court could reduce a long period of licence disqualification if the offender agreed to drive only with an interlock device installed. It was used as a voluntary way back onto the road for some offenders.

From 1 February 2015, the Road Transport Act 2013 (NSW) was amended to make interlock orders mandatory for:

  • all first-time High Range PCA offenders (Blood Alcohol Concentration > 0.150), and
  • repeat offenders with a second or subsequent alcohol-related major offence within 5 years.

This shift meant the Court was now required to impose a period of disqualification followed by a compulsory interlock period, rather than simply banning people from driving for years. The thinking behind this was that extremely long periods “off the road” often destroyed employment and family stability, and created serious hardship for dependants — punishing not just the offender, but also children and other innocent people who rely on transport.

The law tried to balance two goals: protect the public from intoxicated drivers, and avoid unnecessarily wrecking an offender’s livelihood where there were supervised alternatives like interlock devices. With better interlock technology available, Parliament adopted interlocks as a more targeted response than long blanket bans in many cases.

Then on 3 December 2018, further amendments commenced. These changes expanded the categories of offences that trigger a mandatory interlock order to include:

  • first-time Middle Range PCA offences (section 110(4), Road Transport Act 2013),
  • first and second (or subsequent) Drive Under the Influence (DUI) of alcohol offences (section 112, Road Transport Act 2013), and refusing or failing to provide a breath or blood sample (Schedule 3, clauses 16(1)(b) and 17(1)(a1)).

In other words, interlock has become the default pathway back to driving for a wide range of serious alcohol-related traffic offences in NSW.

Why Did NSW Move to Mandatory Interlock?

The goal is to reduce drink driving on NSW roads, while still giving certain offenders a safe way back to lawful driving. A total driving ban can destroy employment, restrict medical access, and create hardship for dependants. The Alcohol Interlock Program allows earlier return to the road – but under electronic monitoring, strict licence conditions and ongoing compliance obligations.

Public safety is still the priority. Agencies such as Transport for NSW and NSW Police Force focus on deterrence and road safety. Courts sentence with those same goals in mind.

What Is the Alcohol Interlock Device?

The Alcohol Interlock Device is a professionally installed electronic breath-testing unit wired into a vehicle’s ignition system. Before the car will start, the driver must provide a clean breath sample. The device measures Blood Alcohol Concentration (BAC). If alcohol is detected above the permitted threshold, the car will not start. You then have to wait a period of time before attempting again.

To legally participate in the Alcohol Interlock Program in NSW you will generally need to:

  • complete the Court-ordered licence disqualification period;
  • arrange an accredited interlock service provider (approved by Transport for NSW) to fit the device to the nominated vehicle;
  • obtain a NSW Class C (car) licence that carries a special licence condition stating you may only drive a vehicle fitted with an approved interlock device.

Once you hold that special interlock licence, you are legally permitted to drive — but only while complying with every interlock rule, servicing requirement and breath test requirement. These licence conditions are strict and enforceable.

Benefits of the Alcohol Interlock Program

From an offender’s perspective, the main benefit is simple: you can often get back on the road faster than under the old system of very long disqualification periods with no driving at all. This can save a person’s job or allow a parent to keep transporting children or vulnerable family members.

From the community’s perspective, the interlock device is a safety net. It is specifically designed to prevent a person from operating a vehicle while alcohol is still in their system.

Key advantages of the Alcohol Interlock Laws NSW include:

  • Earlier lawful return to driving — but only with electronic safeguards in place to protect the public.
  • Greater chance of keeping your job or staying employable.
  • Ability to keep caring for dependants, getting kids to school or medical appointments, or supporting elderly family members.
  • More incentive to separate drinking from driving and seek help for harmful alcohol use.
  • Maintaining more independence, rather than being completely grounded for years.

Downsides of the Alcohol Interlock Program

Despite its benefits, mandatory interlock comes with real costs and obligations. You need to decide if those burdens are manageable in your circumstances. Some of the drawbacks include:

  • Cost of installation, monthly lease and servicing. Costs vary by provider; check current fees with an accredited provider and Transport for NSW.
  • Regular calibration / maintenance appointments (usually every 60 days, or every 90 days for certain regional/remote drivers).
  • Ongoing compliance for 12 to 48 months depending on offence type and prior record.
  • You may consider the expense or logistics unmanageable — although Transport for NSW offers concessions for some eligible people, such as certain concession card holders, so check what is available people assessed as experiencing severe financial hardship.

If you do not genuinely need to drive for work, medical care or dependants, you might feel the interlock obligations are not worth it. But if your job or family survival depends on you being able to drive, the interlock route can be critical.

The Law Governing Alcohol Interlock Orders in NSW

Mandatory interlock orders are set out in the Road Transport Act 2013 (NSW) , mainly in Division 2 – Mandatory alcohol interlock program. The key sections include:

  • Section 208 – Application of Division
  • Section 209 – Definitions
  • Section 210 – Sanctions with respect to mandatory interlock offences
  • Section 211 – Mandatory interlock orders
  • Section 212 – Interlock order exemptions
  • Section 213 – Conversion of disqualification period to an interlock period
  • Section 214 – Dangerous driving offences in respect of which interlock orders may be made
  • Section 215 – Participation in an interlock program
  • Section 215A – Effect of completion of the interlock period
  • Section 215B – Entitlement to apply for interlock driver licence

One of the most important policy changes when mandatory interlock was introduced is that NSW also reduced certain disqualification periods. Instead of leaving people off the road for years, the law often imposes a shorter disqualification and then transitions them onto an interlock licence for a defined monitoring period.

The following table is a general guide to standard mandatory disqualification and interlock periods. It draws on section 211 of the Road Transport Act 2013. Your specific case may differ depending on facts, priors and how the Court sentences you.

Mandatory Interlock Offence Minimum Disqualification (DQN) Maximum Disqualification (DQN) Minimum Interlock Period
Novice Range PCA (0.00–<0.020) Special Range PCA (0.020–<0.050) Low Range PCA (0.050–<0.080) Where this is a 2nd or subsequent “major alcohol related” offence within 5 years 1 month 3 months 12 months
Middle Range PCA (0.080–<0.150) 1st major alcohol related offence in relevant 5-year period 3 months 6 months 12 months
Middle Range PCA (0.080–<0.150) 2nd or subsequent major alcohol related offence in relevant 5-year period 6 months 9 months 24 months
High Range PCA (>0.150) 1st major alcohol related offence in relevant 5-year period 6 months 9 months 24 months
High Range PCA (>0.150) 2nd or subsequent major alcohol related offence in relevant 5-year period 9 months 12 months 48 months
Drive Under the Influence of Alcohol (DUI) 1st major alcohol related offence in relevant 5-year period 6 months 9 months 24 months
Drive Under the Influence of Alcohol (DUI) 2nd or subsequent major alcohol related offence in relevant 5-year period 9 months 12 months 48 months
Refuse / Fail Breath or Blood Analysis 1st major alcohol related offence in relevant 5-year period 6 months 9 months 24 months
Refuse / Fail Breath or Blood Analysis 2nd or subsequent major alcohol related offence in relevant 5-year period 9 months 12 months 48 months
Combined alcohol and drug, s 111A(1) (high range plus drug) 1st offence 6 months 9 months 24 months
Combined alcohol and drug, s 111A(2) (mid range plus drug) 1st offence 3 months 6 months 12 months
Combined alcohol and drug, s 111A(3) (novice, special or low range plus drug) 1 month 3 months 12 months

As you can see, even for serious offences like High Range PCA, the law now contemplates a period of disqualification followed by a structured interlock period. This is a major shift away from extended total bans.

Refusal to Participate in the Mandatory Interlock Program

“Mandatory” means mandatory. If the Court orders you into the Alcohol Interlock Program and you are not granted an exemption, you are required to complete the disqualification period and then complete the interlock period in order to lawfully drive again.

If you simply refuse to participate, you cannot just sit out part of it and then drive anyway. The law says that if you do not complete your mandatory interlock order, you cannot hold a licence (other than a learner or interlock licence) for 5 years starting on the day of your conviction, unless you complete the minimum interlock period first (RTA s 211(1)(b)).

For most people, being unable to drive for over half a decade is simply not realistic. That is why compliance with the interlock order is, in practice, the only workable path back to lawful driving.

Applying for an Alcohol Interlock Exemption in NSW

NSW makes interlock exemptions hard to get. Under s 212(5), cost, needing to drive for work, or the registered operator refusing consent are not grounds on their own, except for a first middle range offence or a first combined alcohol and drug offence under s 111A(2).

Under Section 212 of the Road Transport Act 2013, a Court may make an interlock exemption order only if you prove:

  • you have no access to a vehicle in which to install the interlock device; or
  • you have a medical condition diagnosed by a registered medical practitioner that prevents you from using an interlock device; or
  • for a first middle range PCA offence (s 110(4)) or a first s 111A(2) combined offence only, that an exemption is more appropriate in all the circumstances because of severe hardship (s 212(3)(c)).

Evidence for an exemption application is usually given by affidavit and supporting documents (for example medical certificates). The application must be raised with the Court before sentencing orders are made. If you wait until after sentence, you’re usually too late.

If — and only if — you obtain an exemption, the ordinary disqualification periods in s 205 apply instead (s 212(2)). Those periods are often longer than the disqualification part of an interlock order, with no driving at all. That’s why many people, even if interlock feels painful, still choose the mandatory interlock path: it often gets them lawfully driving again far sooner than an exemption outcome would.

Step-by-Step: Completing the Alcohol Interlock Program

Below is the practical workflow that most NSW drivers will go through when they are placed on a mandatory Alcohol Interlock Order by the Court.

Step 1: Receive a Mandatory Interlock Court Order

The Local Court will sentence you, impose a disqualification period, and then require you to participate in the mandatory interlock program. Sometimes people do not realise that the interlock requirement applies until they later attend a service centre. Confirm the requirement with Transport for NSW ahead of time.

Step 2: Complete the Court-Ordered Disqualification Period

You must serve the disqualification period first. You cannot drive at all during that Court-ordered disqualification period. Only after that ends can you move into the interlock phase.

Step 3: Attend a Brief Medical Consultation

You will need to obtain a completed “Alcohol Interlock Program – Brief Medical Intervention Certificate” from a doctor. The doctor will ask about alcohol use, physical health and your ability to safely operate the device. This certificate is required before you can get your special interlock licence.

Step 4: Get the Interlock Device Installed by an Approved Installer

Before your disqualification finishes, book an authorised interlock installer to fit the device to your nominated vehicle. You will be trained on how to use the interlock, how to manage lockouts, how to handle breakdown scenarios and how to meet the servicing schedule. The installer will then issue you with an “Alcohol Interlock Installation Certificate”.

Step 5: Apply for Your Interlock Licence at a Service NSW centre

After your disqualification period ends, you attend a Service NSW centre. You must bring:

  • the completed Medical Intervention Certificate,
  • the completed Interlock Installation Certificate, and
  • the Interlock Driver Licence Statement & Privacy Declaration.

You will pay the relevant licence fees at this point. Be aware that outstanding fines or unresolved traffic matters can sometimes block processing.

Step 6: Agree to Special Interlock Licence Conditions

There are a range of strict conditions (commonly two dozen or more) attached to the interlock licence. By signing the Interlock Driver Licence Statement & Privacy Declaration, you acknowledge you understand and accept these conditions. You must follow them completely. If you breach them, you risk losing your ability to drive.

Step 7: Obtain Your Interlock Licence

Once approved, you receive a NSW interlock licence. That licence may be provisional or unrestricted (including good behaviour restricted licences). Learner holders generally cannot start the interlock program until they progress to a higher licence class.

Step 8: Ongoing Servicing and Monitoring

You must return to the approved installer for servicing and data download roughly every 60 days (regional/remote drivers may get 90-day intervals, but you must confirm that in advance). Tampering with the device, missing services or allowing unauthorised persons to blow is an offence.

The installer will transmit interlock data to a central system. You will usually be able to access data summaries after each service. This data proves if you have attempted to drive with alcohol in your system.

Step 9: Completion of the Interlock Period

When near the end of your interlock period, contact Transport for NSW (13 22 13) to confirm your official end date. Do not remove the interlock device early. A qualified technician must do removal, and only after you are legally clear to do so and eligible to resume a normal licence.

Need Help With an Alcohol Interlock Order or Exemption in NSW?

If you have been charged with High Range PCA, Middle Range PCA, DUI alcohol, or refusing breath/blood analysis in NSW, you are likely facing a mandatory interlock order. The way you handle sentencing can dramatically change how long you are off the road, how soon you can work again and whether you can realistically comply with the program.

A lawyer can advise on interlock strategy, hardship evidence, exemption applications for rare cases, and how to present your situation to the Magistrate in the most responsible and persuasive way.

This page is information only, not legal advice. Your exact obligations under NSW Alcohol Interlock Laws depend on your charge, your reading, your driving history and the sentencing Magistrate. Always get specific legal advice before Court.

Why Acting Early Helps

  • Preparing you for what the Magistrate will ask.
  • Organising supporting material (employment, medical, hardship).
  • Helping you avoid accidental self-incrimination in open court.
  • Explaining realistic outcomes and the limits of what the court can do.

To compare general sentencing ranges, see our guide to drink driving penalties in NSW and drug driving offences and penalties in NSW.

For official information, see the Transport for NSW alcohol interlock program pages.

Important NSW Interlock & Licence Resources

Below are key Transport for NSW forms and guidance documents commonly required when you apply for and maintain an Alcohol Interlock Licence in New South Wales. These PDFs are controlled by the State and may update from time to time. Always check the latest version directly with Transport for NSW before relying on them.

Licence Application

Used when applying for your licence after disqualification and before commencing your interlock driving authority.

Interlock Driver Licence Statement & Privacy Declaration

Must be completed within 28 days before application. Confirms you understand and accept strict interlock licence conditions.

Interlock Installation Certificate

Completed by your accredited interlock service provider within 28 days prior to licence issue. Confirms proper installation and training.

Medical Consultation Certificate

Your doctor must complete part of this form in the 28 days before application. Confirms you are medically fit to use the interlock device.

Participant Alcohol Interlock Guideline

Transport for NSW guidance for interlock participants, including servicing, compliance, lockouts, remote area servicing and program completion.

Driving interstate while on an interlock licence

A NSW interlock licence and its conditions apply to driving in NSW. If you move to, or want to drive in, another state while subject to a NSW interlock order, check with Transport for NSW and the licensing authority in that state before you drive there. Each state has its own rules about recognising interstate licence conditions and disqualifications.

Breaching interlock conditions

Driving a vehicle without an interlock while on an interlock licence, tampering with the device, or having someone else provide a breath sample are offences. A breach can lead to further charges, a longer interlock period, or the cancellation of your interlock licence. If you receive a notice about a recorded breach, get advice quickly. Call 1300 941 900 or make an enquiry about legal representation.

FAQs: alcohol interlock laws in NSW

Which offences carry a mandatory interlock order in NSW?

Middle range and high range PCA, DUI alcohol, refusing or failing to provide a breath or blood sample, combined alcohol and drug offences under s 111A, and a second novice, special or low range PCA offence within 5 years of another alcohol-related major offence (RTA s 211 Table).

How long is the interlock period?

The minimum interlock period is 12, 24 or 48 months depending on the offence and your history, after a disqualification period set within the range in the s 211 Table.

Can I get an exemption?

Only if you prove you have no access to a vehicle that can be fitted, or a diagnosed medical condition prevents you using an interlock. Severe hardship is a ground only for a first middle range offence or a first s 111A(2) offence. If an exemption is granted, the ordinary s 205 disqualification applies instead.

What if I refuse to do the interlock program?

You cannot hold a normal licence for 5 years from the date of conviction unless you complete the minimum interlock period first (RTA s 211(1)(b)).

Do I need a medical certificate?

Yes. Transport for NSW requires a brief medical consultation certificate before the interlock licence is issued.

Should I get legal advice?

Yes, before sentence. Where the court sets the disqualification within the range, and whether an exemption is realistic, depend on your evidence.

Sources and date checked

The law on this page was checked against these primary and official sources on 21 Oct 2026. Penalty unit dollar amounts are as at 21 Oct 2026.

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

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