What's decided about the conch in this chapter? Why ?

In Chapter Two, Ralph announces that they will have to establish rules, not only in meetings, but also to organize day-to-day life. He states that, in meetings, the boys will have to raise their hands, like in school, so as to ensure that they speak one at a time. The boy whose turn it is to speak will receive the conch shell, which he will hold while talking, and then will pass it along to the next speaker.