Environment Minister moves to end carbon unit auctions

ENVIRONMENT Minister Greg Hunt has moved to end auctions of carbon emissions, in a bid to test Labor and The Greens on whether they support the government's plan to axe the carbon tax.

Mr Hunt on Monday confirmed he had signed a "revocation determination" to end the carbon auctions, which were due to be completed by the end of June.

He said the move gave business certainty that "they no longer need to take part in carbon unit auctions", a move to speed up the process of dismantling the carbon tax.

But Mr Hunt said in a statement the revocation could be disallowed "if Labor and the Greens unite to support a motion in the Senate".

While The Greens have confirmed they will block the move, the Opposition is yet to show its cards on political test.

Mr Hunt said the decision came down to "a very clear choice" for Opposition Leader Bill Shorten, saying Labor no longer supported the carbon tax, "yet they refuse to repeal it".

The issue is likely to be considered during Labor internal caucus meeting on Tuesday, while the Opposition has not yet confirmed which way it will vote.