As a result, the timekeepers erred with respect to Rule 10.4.1; that is, the siren did not continue to sound until it was formally acknowledged by an umpire. Acknowledgement of the siren requires any one of the three field umpires to raise both arms into the air and blow the whistle. There remains some doubt as to whether any of the three umpires did hear the siren, but in any event, none chose to bring play to an end as required by Rule 10.4.2. The rules do make clear that the umpires, rather than the siren, are the sole judges of when a quarter ends; but in practice this is in the form of a split second judgement call on whether a mark or kick occurred before or after the siren sounded – rather than the 25 seconds difference in this case.