The Dáil's been assured that new allegations from Pearse Doherty about Denis O'Brien's relationships with IBRC will be covered by a Commission of Investigation.
But opposition parties want the terms of reference to be changed for a guarantee that the matters can be investigated by the judge running the inquiry.
IBRC's liquidators say the claims made by Deputy Doherty on the Dáil record last night are "inaccurate and misleading".
Separately the Sinn Fein leader has claimed Richard Bruton was aware of the SiteServ deal before Michael Noonan.
He presented new documents received under Freedom of Information which show both Minister Bruton's Department and the Competition Authority were notified about the deal just days after IBRC's board agreed to it.
This was before the Department of Finance became aware of the deal, or any concerns about it, for the first time.
However the minister said he was only informed about it as a matter of routine because of the Competition Authority complaint, which was dismissed because there were no competitiveness concerns about SiteServ at the time.
Our political correspondent Gavan Reilly filed this report for Today FM's National Lunchtime News:
