Police can stop you for a breath test at any time in Sydney, but many drivers don’t know their rights during this process.
Understanding when you can request a second test could make the difference between keeping your licence and facing serious penalties. We at Best Sydney Criminal Lawyers see drivers lose their rights simply because they didn’t know the proper procedures.
What Are Your Rights During Police Breath Testing
Legal Requirements Police Must Meet
Police in Sydney operate under strict legal frameworks when they conduct breath tests. The Road Transport Act 2013 requires officers to complete tests within two hours of the suspected offence, and they must follow specific procedures at all times. Police cannot request a breath test if you haven’t operated a vehicle within the last two hours, and medical exemptions verified by a doctor provide valid grounds for refusal. These time limits exist because alcohol readings change significantly over time, which makes delayed tests legally unreliable.
When Police Can Stop You for Tests
Officers can request breath tests in three specific situations: when they suspect you’ve committed a traffic offence, during random breath tests, or if you’ve been involved in an accident. Random breath tests became legal in New South Wales in 1985, which gave police broad powers to stop any driver without prior suspicion. However, this power has limits – police cannot test you at your home if you’re fully on your property, and they must have reasonable grounds if they stop you outside of official RBT operations.
Your Obligations During Tests
You must provide only your driver’s licence during a breath test, which includes your full name and address. Police are not required to tell you roadside breath test results, though they must issue a certificate if the station test fails. Refusal to provide a sufficient sample equals a high-range drink charge with penalties up to $3,300 and up to 18 months imprisonment for refusing a breath test. You can request a blood test after you complete the breath analysis, and samples get divided into three parts: one for you, one for analysis, and one as a control sample.
Legal Protections Available to You
The law provides specific protections during breath tests that many drivers don’t know about. Police cannot force you to take a test if more than two hours have passed since you last drove a vehicle. Medical conditions verified by a doctor can exempt you from tests, though you need proper documentation.

Courts recognise that breath samples may yield higher alcohol readings compared to blood tests (especially if you haven’t consumed alcohol within an hour prior to tests). These protections become important when you need to request a second test or challenge results in court with drink driving lawyers.
Can You Get a Second Breath Test
When Police Must Allow Second Tests
New South Wales law permits second breath tests in specific situations that most drivers don’t understand. Police must allow a second test if you disagree with initial results at the station, though this doesn’t apply to roadside preliminary tests. The Road Transport Act 2013 requires officers to conduct a second breath analysis if the first station test produces a reading you dispute, and this second test becomes the official result used in court proceedings. Police cannot deny this request if you make it immediately after you receive your first station test result, and the second test must use the same calibrated equipment under identical conditions.
Time Restrictions That Apply
You have extremely limited time to request a second breath test – typically within minutes of your first result. Police stations operate under strict protocols where the second test must occur within the same two-hour window as the original offence, and delays beyond this timeframe invalidate all results. Officers must complete both tests during the same detention period, which means you cannot leave the station and return later for additional tests.

The time becomes critical because alcohol levels continue to change in your system, and courts recognise that significant delays between tests compromise accuracy and legal validity.
Required Police Procedures
Police must follow exact procedures when they conduct second breath tests, and procedural errors can invalidate results entirely. Officers must use properly calibrated breath analysis machines, provide you with a certificate that shows both test results, and maintain continuous custody of all samples and documentation. The second test requires the same preparation period as the first – typically 15 minutes without food, drinks, or cigarettes – and police must observe you during this wait period. Courts have dismissed cases where officers failed to follow these mandatory procedures, making proper protocol adherence essential for legally admissible results. Police must also inform you that the second test result will replace the first result for all legal purposes, regardless of whether it’s higher or lower than your initial reading.
What Happens After Second Tests
The second breath test result becomes your official blood alcohol concentration for all legal proceedings. Police issue a new certificate that replaces your first test result, and this second reading determines your charges and penalties. If the second test produces a lower reading, you may face reduced charges or avoid penalties entirely. However, if the second test shows a higher reading, you face penalties based on the higher result. This process leads directly to what happens if you refuse tests or fail to meet legal requirements.
What Penalties Apply When You Refuse or Fail Testing
Immediate Consequences of Refusal
Police impose automatic penalties identical to high-range drink charges when you refuse a breath test in Sydney. Officers treat insufficient breath samples as refusal, which means fines up to $5,500 and imprisonment up to 2 years for first offenders. Repeat offenders face fines up to $5,500 and imprisonment for up to two years under current New South Wales law. Police suspend your licence immediately for at least six months and can detain you at the station until you provide adequate samples through three attempts. Courts impose these penalties because refusal prevents proper assessment of your blood alcohol concentration (which makes it impossible to determine actual impairment levels).
Licence Suspension and Court Procedures
Failed breath tests result in immediate 24-hour suspensions for low-range offences, with longer suspensions for higher results. Court cases begin within weeks of your test, and magistrates rarely show leniency for refusal cases because co-operation with police affects outcomes significantly. First convictions within five years can result in automatic licence disqualification periods from three months to two years based on your blood alcohol level. Interlock laws require breath test devices in your vehicle for serious offences, which adds equipment costs and monthly fees to your penalties.
Long-term Impact on Records and Insurance
Drink charges remain on your criminal record permanently and appear on police checks for employment. Insurance companies exclude liability coverage for accidents that involve intoxicated drivers, though they must prove intoxication through evidence beyond breath test results alone. Your insurance premiums increase substantially after convictions, and some insurers refuse coverage entirely for repeat offenders. Work licences provide limited access during suspensions, but applications require complex legal procedures that most people cannot navigate without professional assistance.
Financial Costs Beyond Fines
Court costs add hundreds of dollars to your penalties on top of the base fines for refusal or failed tests. Legal representation becomes necessary for most cases (especially when you face licence disqualification or imprisonment), which adds thousands in attorney fees. Interlock device installation costs approximately $2,200 plus monthly monitoring fees of $100-150 throughout your disqualification period.

Lost income from licence suspension affects your ability to work, particularly in jobs that require transport or commercial licences.
Final Thoughts
Police must follow strict procedures when they conduct breath tests in Sydney, and you can request a second test at the station if you disagree with initial results. Time limits become critical since you have only minutes to make this request after your first station test. Officers must use properly calibrated equipment and provide certificates that show both test results.
Refusal to take a breath test carries identical penalties to high-range drink charges, with fines up to $5,500 and potential imprisonment. These consequences affect your criminal record permanently and increase insurance costs substantially. The financial impact extends beyond fines to include court costs, legal fees, and interlock device expenses (which can total thousands of dollars annually).
Professional legal advice becomes essential when you face breath test charges or licence suspension. We at Best Sydney Criminal Lawyers handle traffic offences and can protect your rights throughout the legal process. Our team understands the complexities of breath test laws and works to achieve favourable outcomes for clients.