An oversize overmass (OSOM) permit lets a Class 1 load-carrying vehicle, one carrying a large indivisible item, travel when it exceeds mass or dimension limits and no gazette notice covers the move. The permit sets the route, travel times and conditions, including any pilots or escorts.
OpsChase pilot vehicle software reads the permits you already receive and suggests the pilot setup for you to confirm.
Notice first, then permit
If a gazette notice covers the vehicle, load and route, the move runs under the notice and no permit is needed. The national Class 1 load-carrying vehicle notices for 2026 cover loads up to 5.5 metres wide, 35 metres long and 5 metres high, and up to 115 tonnes, depending on the state, in the Australian Capital Territory, New South Wales, Queensland, South Australia and Victoria.
Where to apply
- Most states and the Australian Capital Territory: through the online system of the National Heavy Vehicle Regulator (NHVR), NHVR Go.
- Western Australia: Main Roads Western Australia, which uses single trip permits.
- Northern Territory: the Northern Territory Government, which introduced its own OSOM notices in April 2025.
Why pilots need a copy
The NHVR issues permits to operators, not to pilots. It says pilots cannot meet their obligations unless the operator tells them the conditions, and the best way is a full copy of the permit. A pilot must not go with the load on an unapproved route, outside permitted hours, or with fewer pilots than required.
How OpsChase helps
Upload or forward the permit PDF. OpsChase pulls out the route, times, curfews, dimensions and pilot or escort conditions, suggests how many pilots the move needs, and sends each confirmed pilot the full permit. You check and confirm first. Read what pilots and booking agents check on a permit. OpsChase is independent software; permits are still applied for and issued through the usual channels.
On OpsChase: one queue for your team and contractors, follow-up when a job goes quiet, and photos or sign-off before it closes. Book a demo — one site or many.
- What does OSOM stand for?
- Oversize overmass. The national law calls these vehicles Class 1 load-carrying vehicles.
- Do I always need a permit for an oversize load?
- No. If a gazette notice covers the vehicle, load and route, the move can run under the notice and its conditions.
- Does OpsChase apply for permits?
- No. It reads the permits you already receive. Permits are still applied for and issued through NHVR Go or the state road authority.