When the specified amount of television advertisements in a quarter has been consumed, if it is a second charged team timeout in the same dead-ball period, or when the referee so declares, timeouts shall be 30 seconds in duration. If a first down is earned before the end of the 30-second timeout, the clock will not reset. A team can use all its timeouts during one drive of 15 minutes or less. A team cannot use more than one timeout in any period other than during a drive. A team can also use multiple 10-minute breaks during one game as long as they occur after different sets of opponents have been played. The NCAA does not allow coaches to call their own timeouts from the sidelines; only the opposing coach may do so. However, if there is a dispute about whether or not to use a timeout, either party can request a review by waving a white flag on the field. The referee will then signal to the crew in charge of timing the game that there is a disagreement and they should stop timing the game while the review takes place. Timeouts are used to stop the clock with 1 minute left in a half (or in any overtime period) or in case of injury or foul trouble for any player. A team can have up to three timeouts remaining at the end of a half; additional timeouts can be used during replay reviews.