With decades of experience, ModiCert delivers tailored solutions for heavy vehicles across Victoria. We focus on safety, compliance, and efficiency, helping create safer roads through expert engineering and strict regulatory standards. Our services include consultancy, detailed assessments, and dependable approvals for heavy vehicle modifications.
We specialise in VASS certification (Blue Plate) and ensure full compliance with all regulations. Our team includes a qualified heavy vehicle engineer and authorised VASS signatory, recognised as a professional authorised by the Department of Transport and Planning to inspect and certify modified vehicles. This allows us to issue the essential VASS approval certificate your modified vehicle requires.
By partnering with ModiCert, you gain accurate and reliable engineering services that keep your fleet safe, compliant, and roadworthy. We combine technical expertise with a practical approach, driving innovation and building confidence in every journey.
As a registered signatory engineer for VASS certifications, we ensure all modifications to your heavy vehicle meet regulatory standards and simplify every step of the modification and approval process.
If you’ve made changes to your heavy vehicle or brought one in from another state or overseas, you might need a VASS certificate to legally register and drive it on the road. VASS (Vehicle Assessment Signatory Scheme) is a system designed to make sure heavy vehicle modifications meet proper safety and design standards.
VASS approval is required in several situations, including:
A VASS certificate proves that your vehicle is safe, roadworthy, and built to the required standards. It’s an important step to ensure your vehicle is not only compliant but also safe for everyone on the road.
If you’re unsure whether you need one, don’t worry—we can help. At Modicert, we provide professional VASS certification and heavy vehicle modification services to make the process smooth and hassle-free.
In Australia, a heavy vehicle has a gross vehicle mass (GVM) or aggregate trailer mass (ATM) over 4.5 tonnes. Only changes that affect design, safety, or compliance need approval. Small additions like extra lights, aerials, or air-conditioning usually do not require it if the vehicle stays compliant. Major or safety-related changes such as suspension work, chassis modifications, or mass rating upgrades must be approved by an engineer under the Heavy Vehicle Modifications Code (VSB6).
A VASS (Vehicle Assessment Signatory Scheme) certificate is an engineer’s approval for a heavy vehicle modification. It confirms the work meets all required standards. Any heavy vehicle over 4.5 tonnes GVM modified under VSB6 rules needs a VASS certificate. This approval is accepted across Australia.
Any change to structure or systems that affects safety or compliance often needs certification. Examples include suspension upgrades, brake changes, chassis or wheelbase adjustments, custom body mounts, tow coupling or fifth wheel installation, and changes to mass ratings (GVM, ATM, GCM). Accessories like extra lights or radio aerials usually don’t require it.
