Leinster coach Matt Williams has been severely restricted in the announcement of his side for the European Cup quarter-final on Saturday.
The European Cup Rugby Limited rules state that the relevant teams for a Saturday game must be announced by Friday noon.
But, Williams has only been able to list nine selected players.
Six positions are still up for grabs due to injury doubts about the likes of Irish internationals Denis Hickie, Shane Horgan, Reggie Corrigan, Shane Byrne, Emmet Byrne and Keith Gleeson.
LEINSTER (v Biarritz): Girvan Dempsey; Denis Hickie/Peter McKenna, Brian O' Driscoll (Vice-Captain), Shane Horgan/David Quinlan, Gordon D'Arcy; Christian Warner, Brian O' Meara; Reggie Corrigan (Captain)/Emmett Byrne; Shane Byrne/Gavin Hickie; Peter Coyle/Emmett Byrne, Leo Cullen, Malcolm O' Kelly, Eric Miller, Keith Gleeson/Aidan McCullen, Victor Costello.
Replacements: Peter Coyle/Niall Treston, Gavin Hickie, Aidan Kearney, Aidan McCullen/Liam Toland, Brian O' Riordan, Nathan Spooner, David Quinlan/Paddy Wallace/Peter McKenna.