Vehicles fitted with gas fuel systems

If you’re the owner of a vehicle that is being fitted with a gas fuel system, you must use a VicRoads-approved service provider for both the installation and all ongoing maintenance. You must also notify VicRoads of your vehicle’s modification.

Who can do conversions?

In Victoria, only service providers with an Alternative Fuel Systems Assessment and Certification Scheme (AFSACS) Agreement with VicRoads in place are approved to undertake gas fuel system conversions.  Conversion work undertaken by a provider without a current AFSACS Agreement in place will not considered an acceptable modification by VicRoads. It may also be unacceptable to vehicle insurance providers. 

Compliance requirements

All Liquified Petroleum Gas (LPG), Compressed Natural Gas (CNG) and Liquified Natural Gas (LNG) installations to vehicles must comply with the relevant technical requirements of the Australian Standard current at the time of conversion.

The structural integrity of the vehicle and its continued compliance with standards of registration must not be adversely affected by the installation.

LPG conversions

If the vehicle was converted on or after 1 February 1993, an approved AS 1425 LPG compliance plate must be fitted to the vehicle at the time of the conversion. Vehicles fitted with LPG systems are required to have an 'LP Gas' plate attached to the vehicle number plates, including bike rack number plates. 

CNG conversions

All Compressed Natural Gas (CNG) installations must comply with the technical requirements of the Australian Standards AS 2739 current at the time of conversion. If the vehicle was converted to CNG after 1 August 2000, an approved AS 2739 CNG compliance plate must be fitted to the vehicle at the time of the conversion.

LNG conversions

All LNG installations must comply with the technical requirements of the version of Australian Standard AS/NZS 2739 current at the time of conversion and be fitted with an acceptable NG compliance plate if converted to operate on LNG on or after 16 March 2009.

If you are the owner of a vehicle that is being fitted with a gas fuel system, you must notify VicRoads of your vehicle’s modification by providing an LPG/CNG conversion report. You'll find this form on the back of the VicRoads' Vehicle Standard Information 27 [PDF 509 Kb]. This report needs to be signed by an approved AFSACS (Alternative Fuel Systems Assessment and Certification Scheme) provider. VicRoads may consider accepting certification issued by other recognised state and territory authorities.

No inspection of the vehicle by VicRoads is required.

Note: If significant alterations are made to the vehicle to accommodate the gas system, an engineering assessment of the modification may be required. Please consult with your installer to establish whether your modification has changed the structural integrity of your vehicle, in which case a Vehicle Assessment Signatory Scheme (VASS) approval certificate will be required. 

Submit your form(s) to VicRoads by:

Decommissioning a gas fuel system

In the case that a vehicle will no longer be running on gas, the system must be decommissioned, and the compliance plate removed. VicRoads must be notified of any changes made to the vehicle. 

A vehicle that has undergone approved conversion to LPG, LNG, or CNG requires re-certification every 10 years from the date of compliance. 

In Victoria, only service providers that have a current Alternative Fuel Systems Assessment and Certification Scheme (AFSACS) Agreement with VicRoads are approved to undertake this work. 

You’ll find a list of providers that are approved by VicRoads to work on vehicles fitted with gas fuel systems here: 

Looking for information about providing gas fuel systems services? 

To work in Victoria on vehicles that are fitted with gas fuel systems, you must enter into an Alternative Fuel Systems Assessment and Certification Scheme (AFSACS) Agreement with VicRoads. 

This scheme replaces the former requirement to be registered with the Automotive Alternative Fuels Registration Board, known as AAFRB (on 1 January 2020, responsibility for regulating and supporting the alternative fuels industry transferred from AAFRB to VicRoads).

Are you a technician?

You can only work on gas fuel systems in vehicles if you have acceptable trade and training qualifications and are an Associate Technician employed or contracted to an approved AFSACS provider. 

Learn more about becoming an AFSACS Associate Technician

Need help or advice?

Queries about vehicles fitted with a gas fuel system should be directed to VicRoads’ Vehicle Safety & Registration Services team. 

They’re available Monday to Friday between 8.30am-5.00pm by emailing [email protected] or calling 1300 309 571.

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