The Director General of the GAA, Paraic Duffy, says they were told by Dublin City Council that five Garth Brooks concerts would be no problem.
It is the turn of representatives from the GAA and Aiken Promotions to be questioned about the fiasco at the Oireachtas Transport Committee today.
Mr Duffy says Stadium Manager, Peter McKenna, was given assurances by Owen Keegan in a phone call.
Mr Duffy said: "Mr Keegan advised Peter McKenna that Dublin City Council would support a licence application for all five concerts.
"Mr Keegan asked Peter McKenna to make the decision-making process as easy as possible for Dublin City Council."
The Director of Croke Park, Peter McKenna, earlier contradicted Dublin City Council chief executive Owen Keegan regarding what happened in the run-up to the decision to grant only three concerts.
Mr McKenna told the committee he is prepared to make a sworn statement that he received a verbal assurance from Mr Keegan that the City Council supported the idea of giving a licence for five concerts.