A date has been set for Taoiseach Bertie Ahern to give evidence at the planning tribunal later this month.
Mr Ahern will be questioned at the inquiry on the afternoons of Thursday July 26th and Friday July 27th. His former partner, Celia Larkin, and businessman Micheal Wall will both appear before the tribunal on Wednesday July 25th.
The tribunal has examined Mr Ahern's finances as part of its inquiries into an allegation that property developer Owen O'Callaghan gave money to Mr Ahern in the early 1990s as part of the Quarryvale project. Mr Ahern and Mr O'Callaghan have said the allegation is untrue.
Mr Ahern's appearance in the witness box will follow testimony from four AIB witnesses - John Garrett, Philip Murphy, Jim McNamara and Elaine Blake. They will be called to answer questions about a number of significant lodgments to AIB, O'Connell Street, in the 1993 to 1995 period, to accounts in the names of Mr Ahern and Ms Larkin.
The key aspect of the evidence will concern foreign exchange transactions that preceded some lodgments.
A £30,000 sterling deposit that Mr Ahern said was made by Ms Larkin does not show up in the records of her bank, according to an opening statement made at the Mahon tribunal in May.
Counsel for the tribunal Des O'Neill SC said bank records disclosed by Allied Irish Banks on the day in question show that sterling worth only IR£1,921.55 was exchanged at the branch Ms Larkin attended.
Ms Larkin made a lodgment of IR£28,772.90 on December 5th, 1994, in AIB's branch in O'Connell Street, Dublin, which was said by Mr Ahern to represent £30,000 sterling in cash he had been given by Mr Wall at his constituency office in St Luke's, Drumcondra.
"A customer presenting exactly $45,000 [US dollars] for exchange into Irish currency on December 5th, 1994, would have received exactly IR£28,772.90," Mr O'Neill told the tribunal on May 29th.
Mr Ahern has said he was not involved in any substantial US dollar transaction.