Legal clarity, made personal - Visual Legal

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In South Australia, police and authorised officers have specific powers to inspect and search vehicles and certain premises — mainly to ensure compliance with road safety, heavy vehicle, and transport laws. 

These powers are set out in Subdivision 4 of the Road Traffic Act 1961 (SA) (ss 40Q–40U) and are designed to protect public safety while balancing privacy and property rights.

At Visual Legal in Adelaide, we often help clients understand when these powers apply, what officers can and cannot do, and how to respond if you’re stopped or inspected. 

Here’s a clear guide to the main powers.

1. Power to Inspect a Vehicle on a Road or Certain Official Premises (s 40Q)

An authorised officer (usually a police officer) can inspect any vehicle located:

• On a road, or
• In or on premises owned or occupied by a public authority

— whether the vehicle is attended or unattended.

What the officer can do

• Enter the vehicle (without consent) for inspection purposes
• Weigh, test, measure, or photograph the vehicle, its equipment, or load
• Check and photograph placards or information required under road laws (e.g., vehicle specifications, load limits)
• Inspect and copy records required to be carried in the vehicle
• Access or download electronic data stored in or accessible from equipment in the vehicle (e.g., electronic work diaries, GPS data)

Key limits

• No force can be used (e.g., no breaking locks).
• The officer can only open unlocked doors, panels, or objects.
• These powers can be exercised at any time — day or night, no consent needed.

2. Power to Search a Vehicle on a Road or Certain Official Premises (s 40R)

This is a stronger power than inspection. 

An authorised officer can search a vehicle (and enter it) if they believe on reasonable grounds:

• The vehicle has been used, is being used, or is likely to be used in committing a road law offence, or
• The vehicle has been or may have been involved in an accident.

What the officer can do

• Search for evidence of a road law offence
• Inspect and copy records, devices, or things related to the vehicle, equipment, or load
• Take copies of required records, transport documentation, journey documentation, or electronic data that may provide evidence
• Use reasonable force (e.g., to open locked compartments if necessary)
• Seize and remove items believed to provide evidence of an offence

Key limits

• No power to search a person (only the vehicle).
• The belief can form during an inspection or independently.
• Again, exercisable at any time without consent.

3. Power to Inspect Premises (s 40S)

Officers can inspect certain premises for compliance purposes (e.g., checking records, vehicles, or equipment). 

This applies to:

• Business premises where a responsible person operates or keeps records
• Garage addresses of vehicles
• Premises where required records are kept

What the officer can do

• Enter the premises
• Inspect vehicles at the premises
• Inspect and copy required records
• Check devices (e.g., weighing or monitoring equipment) and copy data
• Use photocopying equipment free of charge

Key limits

• No force allowed (unlocked doors/panels only).
• Entry allowed at any time with consent, or during usual business hours without consent if a business is carried on there.
• Cannot enter unattended premises or predominantly residential areas without consent.

4. Power to Search Premises (s 40T)

A stronger power than inspection. Officers can search premises if they believe on reasonable grounds:

• There may be records, devices, or things providing evidence of a road law offence, or
• A vehicle connected to the premises has been involved in an accident.

What the officer can do

• Enter and search the premises
• Search vehicles at the premises
• Search for and copy records, documentation, or electronic data
• Seize items believed to provide evidence
• Use reasonable force

Key limits

• No power to search a person.
• Entry allowed with warrant, consent, during business hours (no consent needed), or in accident-related cases.
• Cannot enter unattended or predominantly residential premises without warrant or consent.

Important Safeguards

• These powers focus on compliance with Australian road laws (heavy vehicle, fatigue management, load restraint, etc.).
• Officers must act reasonably — belief on reasonable grounds is required for searches.
• Residential premises are protected — entry into homes or parts used mainly for living is restricted without consent or warrant.

If police want to inspect or search your vehicle or premises in South Australia, knowing your rights helps. 

At Visual Legal, we advise clients on road traffic matters, compliance checks, and responding to police powers.

If you’ve been stopped, inspected, or have questions about these powers, book a free consultation. 

We’ll meet in our central Adelaide office or via secure teleconference, explain the law in plain terms, and help you understand your position. 

No pressure, just practical support.

Questions about police vehicle or premises powers in SA? Drop them below or get in touch — we’re here to help.