The trial of the alleged leader of the Real IRA is due to begin at Dublin's anti-terrorist court this week.
Michael McKevitt is the first person to be charged with directing terrorism in the State under the terms of legislation introduced by the Government after the 1998 Real IRA bombing of Omagh.
The 52-year-old's case will start at the Special Criminal Court on Wednesday.
It had been due to go ahead earlier this year but was halted pending a Supreme Court decision.
McKevitt's lawyers had sought leave to seek a judicial review of a decision by the Special Criminal Court on the disclosure of documentation relating to the trial.
But Supreme Court judges rejected the application to challenge a refusal of further disclosure of documents relating to FBI agent Mr David Rupert, one of the key witnesses against McKevitt.
McKevitt, of Blackrock, Dundalk, Co Louth, is charged with being a member of an unlawful organisation styling itself the Irish Republican Army, otherwise the IRA, between August 29th 1999 and March 28th 2001.
The Special Criminal Court has been told that Mr Rupert was observed by gardai meeting Michael McKevitt on a number of occasions.
The no-jury court has also heard that he infiltrated the Real IRA leadership and attended their Army Council meetings.
McKevitt is alleged to have met Mr Rupert over a two-year period and asked him to acquire equipment for dissident republicans.