Glossary

Australian roadworthy and vehicle inspection terms, defined precisely. Every state name, every certificate type, every commonly-confused acronym in one place.

Approved Examiner: An individual who holds the personal authorisation to perform regulator inspections, usually within an Authorised Inspection Station. Approved Examiner status is held by the person, not the workshop, and follows the inspector if they change employer.
ATM (Aggregate Trailer Mass): The total mass of a trailer including its load and any towball download. Used by regulators to classify trailers, under 750 kg ATM is a light trailer (often no inspection required), 750–4,500 kg is a standard trailer, over 4,500 kg is a heavy trailer requiring HVRAS inspection.
Authorised Inspection Station (AIS): A workshop or mobile operator authorised by a state or territory transport regulator to issue roadworthy certificates. The authorisation is specific to vehicle classes, light vehicle, motorcycle, heavy vehicle, and inspectors must be individually qualified.
Blue Slip: The colloquial name for a NSW Authorised Unregistered Vehicle Inspection. Required when re-registering an unregistered vehicle, registering an interstate vehicle in NSW, or returning a written-off vehicle to the road. More thorough than a Pink Slip and costs more.
COI (Certificate of Inspection): A periodic inspection certificate for heavy vehicles, taxis, rideshare vehicles and certain commercial categories. Issued by HVRAS-approved examiners (for heavy vehicles) or authorised passenger-vehicle inspectors. Different from a roadworthy in that it is periodic and event-based rather than transaction-triggered.
Defect Notice (yellow / blue / canary): A written direction from a police officer or transport inspector to rectify specific faults on a vehicle. Yellow for minor defects (drivable while rectifying), blue for major (restricted use), canary for grounded (must not be driven). Each notice lists rectification deadlines.; Also called: yellow sticker, canary sticker
Engineer's Certificate (Mod Plate): A certificate from a registered automotive engineer confirming a non-trivial vehicle modification meets the relevant Australian Design Rules and state vehicle standards. Common for lift kits, suspension changes, engine swaps and significant body modifications. Required before the modified vehicle can pass roadworthy.
eSafety Check: The official NSW name for the Pink Slip inspection. The "e" reflects the electronic lodgement of results with Transport for NSW. Same scope and function as the historical Pink Slip, the document is no longer pink, but the name persists in everyday speech.
Gas Compliance Certificate: A certificate from a licensed gas worker confirming that the LPG installation in a recreational vehicle meets AS/NZS 5601.2. Required for caravans, motorhomes and camper trailers with LPG appliances at sale or first registration. Separate from the roadworthy.
GVM (Gross Vehicle Mass): The maximum total mass a vehicle is rated to carry, including its own weight, passengers, and cargo. The 4.5-tonne GVM threshold separates light vehicles (standard roadworthy) from heavy vehicles (HVRAS / COI). GVM is set by the manufacturer and stamped on the vehicle compliance plate.
Heavy vehicle: A vehicle with a Gross Vehicle Mass over 4,500 kg. Includes trucks, buses, prime movers, heavy trailers and certain motorhomes. Inspected under the HVRAS framework with specialist examiners; receives a Certificate of Inspection rather than a roadworthy.
Heavy Vehicle Inspection: Periodic inspection of vehicles over 4.5 tonnes GVM. Required at intervals set by the National Heavy Vehicle Regulator and individual state regulators, typically annually for buses and certain commercial categories.
HVRAS (Heavy Vehicle Roadworthiness Assessor Scheme): A national scheme under which qualified assessors inspect heavy vehicles over 4.5 tonnes GVM. HVRAS-authorised inspectors handle Certificates of Inspection (COIs) for trucks, prime movers, semi-trailers, buses, and heavy trailers. The pool is much smaller than the light vehicle pool.
Inspection Report (ACT): The ACT name for a roadworthy. Required for interstate transfers into the ACT, re-registration of unregistered vehicles, and after defect notices. Valid 28 days from issue. Issued by Access Canberra-authorised inspectors.
Light vehicle: A vehicle with a Gross Vehicle Mass of 4,500 kg or less. Includes most cars, 4WDs, utes, light vans, light trailers, motorcycles. Inspected under the standard state roadworthy framework.
Mobile Inspection: A roadworthy or other regulated inspection performed by an authorised inspector at the customer's location, driveway, workplace, dealership, rather than at a fixed inspection station. Mobile operators hold the same authorisation as fixed-station inspectors.
Pink Slip: The colloquial name for a NSW eSafety Check, the annual safety inspection required for most registered vehicles 5+ years old. Issued by an Authorised Inspection Station and lodged electronically with Transport for NSW. Required at registration renewal.
Pre-Purchase Inspection: An advisory inspection of a used vehicle before purchase, covering mechanical condition, accident history indicators, electronic fault codes, and overall fitness for purpose. Distinct from a roadworthy: a pre-purchase inspection produces a graded report, not a pass/fail certificate.
RWC (Certificate of Roadworthiness): The Victorian roadworthy certificate, issued by Licensed Vehicle Testers (LVTs) under VicRoads authority. Required when selling, re-registering or transferring an interstate vehicle into Victoria. Valid 30 days from issue, Victoria has the shortest validity in Australia.
Safety Certificate: The official Queensland name for a roadworthy. Required by sellers of registered light vehicles before transfer of ownership. Issued by Approved Inspection Stations (AIS) authorised by the Department of Transport and Main Roads. Valid 60 days for private sellers, 30 days for licensed dealers.
Same-day inspection: A mobile or fixed inspection booked and completed on the same calendar day, usually at a small premium ($20–$40) over standard scheduled rates. Common in capital cities Monday to Friday; rare in regional areas and on Sundays.
Vehicle Inspection (TAS / NT / SA): The name used in Tasmania, the Northern Territory and South Australia for the equivalent of a roadworthy. Scope is similar across states but trigger events and validity periods differ. See the relevant state guide for specifics.