When the Court is in session, the Great Hall is not open to the public, except for those attending Court. The arguments are typically held in two-week cycles of a 10 A.M. and 11 A.M. argument on Mondays, Tuesdays, and Wednesdays. Depending on the significance of the case and the time of year (winter arguments are less popular), visitors should arrive at the Court anywhere from two hours in advance to, in extremely controversial cases, the night before. At some point in the morning, which is not predetermined, the Supreme Court Police Officers distribute numbered tickets. These serve as place-holders only and not a guarantee of admission. Visitors who have tickets may leave the area and return at the appointed time to line up in numerical order, usually one hour before the argument. At this time, there usually are several hundred persons waiting outside the Court, most of whom are not able to observe either argument. While the Courtroom does have seating for some 250 public visitors, in practice there are almost always large groups of students or officials that reduce that number, and visitors who are admitted to observe the first argument generally stay for the second argument, making the total seats available for the second argument generally very small. Just before the first argument, the officers divide the crowd into two lines: one is for those waiting with tickets to observe the entire argument, while the other is to observe a five-minute span of the argument while standing in the back of the Courtroom. Both lines remain in place during the first argument. Visitors must stand when the Justices enter and leave, and remain absolutely silent. Drowsy, noisy, or otherwise disruptive visitors are promptly removed by plainclothes officers.