The Taoiseach Mr Ahern has invited almost 1,000 people to attend the Requiem Mass for the 10 IRA volunteers executed during the War of Independence.
The President Mrs McAleese, every member of the Oireachtas, and almost 600 relatives, have received invitations to the ceremony at the Pro-Cathedral in Dublin on Sunday afternoon, prior to the reinterment.
The leader of Fine Gael, Mr Michael Noonan, the Labour leader, Mr Ruair∅ Quinn, and the new leader of the Green Party, Mr Trevor Sargent, will attend.
The remains of the men, tried and sentenced to death by military court martial in 1920/21, have already been exhumed.
Sunday's ceremonies will begin at noon in Mountjoy Prison. A number of the relatives will be brought by bus to a service at the prison. They have been asked to assemble at Dublin Castle early on Sunday morning. Prior to leaving there, according to the official programme, the relatives will be "categorised and badged" in gold and green.
Prison officers will form a guard of honour as the cortege begins its journey to the Pro-Cathedral, led by an Army motorcycle escort.
It will travel through Phibsborough Road; Broadstone; Constitution Hill; Church Street; Bridge Street; High Street; Lord Edward Street; Dame Street; College Green; Westmoreland Street; O'Connell Street; Cathal Brugha Street; and Marlborough Street.
An Army marching company and the Army Number 1 band will meet the hearses in Westmoreland Street at 12.50 p.m. Relatives will leave the buses they have been travelling in and form up behind the last hearse.
The procession will stop at the GPO where a short ceremony will take place involving a cadet guard of honour which will present arms. A lone piper will play a lament. The cortege will proceed to Marlborough Street. The coffins will blessed at the entrance to the cathedral and be carried inside by Army bearing parties.
Cardinal Connell will be the chief concelebrant of the Mass. At the end of the ceremony the coffins will be placed in the hearses, and the cortege will be joined by the President, the Taoiseach, the Tanaiste, Ms Harney, other members of the Cabinet, and members of the Council of State.
There will be a minute's silence at the Garden of Remembrance before the cortege moves on to Glasnevin Cemetery. .
The Taoiseach will give a graveside oration before the reinterment of nine of the men. Patrick Maher will be brought to Ballylanders, Co Limerick, for reinterment on October 20th, in accordance with the wishes of his family.
The other nine volunteers executed during the War of Independence are: Kevin Barry, Thomas Bryan, Patrick Doyle, Frank Flood, Patrick Moran, Thomas Whelan, Bernard Ryan, Thomas Traynor, and Edmond Foley.