Announcements should be made at the start of each session welcoming the players to the tournament and detailing any specific conditions of the events being played. It is especially important to be very clear about any masterpoint requirements for each event to ensure that all players are in the proper event.
In particular the DIC or his/her designee should announce the eligibility rules for participation in each event, the top on each board, Zero Tolerance if applicable, and other pertinent information. In a qualifying session the DIC must also announce the conditions of qualification for the final session or sessions. This announcement should be made as soon as possible, usually not later than halfway through the session.