Former government press secretary Frank Dunlop is expected to make fresh allegations about payments to Dublin county councillors when the Mahon Tribunal resumes today.
The latest module of the inquiry into planning corruption will deal with the rezoning of lands at Ballycullen in south Dublin owned by developers Christopher and Gerry Jones.
Mr Dunlop is expected to tell the tribunal that he paid IR£17,500 to councillors in connection with the rezoning, which took place in the early 1990s.
The tribunal is also expected to investigate the planning history of the Jones Group headquarters in the Clonskeagh area of Dublin, as well as a IR£12,500 payment by Christopher Jones to the late Fianna Fáil TD Liam Lawlor.
Mr Lawlor drew up a fake invoice in relation to the money, which he has claimed was payment for advice he gave on the Ballycullen rezoning.