Almost all hearings in the Inner House are before three judges, although in important cases in which there is a conflict of authority a court of five judges or, exceptionally, seven, may be convened. The Inner House is sub-divided into two divisions of equal authority and jurisdiction - the First Division, headed by the Lord President; and the Second Division headed by the Lord Justice Clerk. The courts to hear each case are, ordinarily, drawn from these divisions. When neither is available to chair a hearing, an Extra Division of three Senators is summoned, chaired by the most senior judge present; due to pressure of business this Extra Division sits frequently nowadays.