The adjudicator will usually ring a bell one or two minutes before the speaker's time expires as a first warning (such as at 6 minutes in an eight-minute speech). A second warning is then given at the end of the allotted time, signalling that the debater ought to conclude as soon as possible (in many Australian schools, failure to conclude at this point will cause the speaker to lose points). Sometimes the second warning will be a double bell so as to distinguish between the first and second warnings. Some competition rules specify that a speaker must complete his or her speech within 30 seconds either side of the final bell, the warning bell acting only as a warning and not as an indicator that a speaker must stop speaking.