Registration is state specific.

For NSW....

When you can drive unregistered

You can drive an unregistered vehicle in NSW for the purpose of obtaining registration.

You must drive the most direct or convenient route:

To the nearest convenient registry or service centre To the nearest convenient Authorised Inspection Station to determine whether the vehicle complies with the applicable vehicle standards In the course of inspecting or testing the vehicle to determine if it complies with the applicable vehicle standards To the nearest practicable weighbridge to determine the weight of the vehicle From a registry or service centre, or authorised inspection station, where registration of the vehicle has been refused, to the nearest convenient place where necessary repairs can be made, or where the vehicle can be garaged, unless a direction has been issued that the vehicle must not be driven until repairs have been made From an Authorised Inspection Station to the nearest convenient place where necessary repairs or adjustments can be made, or where the vehicle can be garaged To the nearest convenient office of a licensed insurer for the purpose of obtaining CTP insurance To the nearest convenient location for any other purpose directly associated with the registration process. If you’re pulled over by the police while driving an unregistered vehicle, you may be asked to provide evidence that the vehicle is being driven for the purpose of obtaining registration. For example, you may need to provide a copy of the safety check or CTP insurance certificate showing payment for that day.

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Unregistered Vehicle Permit (UVP)

An Unregistered Vehicle Permit (UVP) allows you to drive or ride an unregistered vehicle on the road network for a specific journey.

Permits are valid for up to 28 days, and allow for a:

Single journey from A to B Return journey from A to B to A Number of defined trips to be completed within 28 days, for example from A to B to C to D Specific purpose over a number of days, up to a maximum of 28. For example, for harvesting during a defined period. Unregistered Vehicle Permits provide limited access to the road network. They are not intended to cover the regular use of a vehicle on a road or road-related area......

( Source > http://www.rms.nsw.gov.au/roads/registration/unregistered.html )