Both home and away teams must appoint a competent time keeper who is aware of the by-laws concerning length of quarters and intervals between quarters. Home clubs must provide an accurate timing device.
Timekeepers must complete and sign the timekeeper cards as a check in case of a dispute between goal umpires. Time keepers must sound a warning one minute prior to the end of the first and third quarter breaks and three minutes prior to the end of the half time break.
Please refer to : MSJFL Club Handbook (page 29)