An end to the 'imperfect peace'?

Bertie Ahern gives the impression that an IRA statement is imminent. As discussed here recently this seems largely a matter for the IRA, more than at any time since the peace process began. The question is can the peace be kept after the statement and any unilateral act of decommissioning for long enough to suit the DUP. It would seem a political gamble. As ever, we wait to see if the IRA is willing to play.