The Transport Minister says the Government's focused on getting details right - in a speedy change to the 2023 Clean Vehicle Standard - this week.

It originally gave importers credits for meeting carbon targets, and charged them for missing. 

The Government will now slash them nearly 80 percent, to prevent charges landing consumers.

Chris Bishop says they're focused on rolling out change very quickly.

"The take-home point for people listening is that they're no longer going to be slugged with potentially thousands of dollars of extra charges just for buying a car next year."

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