An interagency intelligence panel in the Bush administration could determine whether additional criminal charges are dropped against fired National Security aide Oliver L. North. The group began its review after U.S. District Judge Gerhard Gesell issued a sealed order last Thursday detailing how much classified information must be disclosed by the defense in order for North to get a fair trial. No final decisions have been made, sources familiar with the process said Monday, speaking on condition of anonymity. An earlier review by the interagency group led to dismissal of conspiracy and theft charges against North.