The Greens have threatened to revoke support for the Telstra split bill in what appears to be retaliation for the Government's failure to produce the NBN implementation study to the Senate.
Senator Scott Ludlam branded Communication Minister Stephen Conroy's decision to ignore a Senate order for the report to be produced as "an offensive snub".
"With the numbers in the Senate so finely balanced and a hostile opposition, the Minister seems determined to burn what little goodwill remains on the crossbenches," Ludlam said.
"The support of the Australian Greens is essential for the Governments telecommunications agenda to progress.
"That support can no longer be taken for granted."
Ludlam said the "suppression" of the only independent analysis of the NBN project would "further erode confidence in the Government's plans for sweeping telecommunications reform."
"In essence, this is the Minister saying 'trust me' with a cheque for $43 billion dollars, and then expecting the Senate to wave through complex and far-reaching legislation without proper scrutiny," he said.
"That isn't going to happen."
Conroy is on the record saying the Government would weigh up the findings before considering whether or not to release the implementation study.