The AFL Commission at its meeting in November last year, approved four changes to the Laws of Australian Football to be implemented in the 2021 Toyota AFL Premiership Season.

These adjustments will apply to all games played in the 2021 AAMI Community Series.
 
1 / Quarter lengths to return to traditional 20 minutes (plus time on)
Games played in the 2021 Toyota AFL Premiership Season will be timed as follows:
Four quarters consisting of twenty (20) minutes plus time on;
Intervals are as follows: 
¼ time and ¾ time – six (6) minutes
Half time – twenty (20) minutes
Time after goals – fifty (50) seconds

2 / A maximum of 75 total player interchanges per match
Rotations will decrease from 90 per match in 2020 to 75 per match in 2021. Each team will continue to be permitted four interchange players.
 
3 / Location of The Mark at Kick Ins
The Mark shall be set at 15 metres from the centre of the Kick-Off Line towards the centre of the Playing Surface at Kick Ins. This was previously set at 10 metres.

4 / Player Standing The Mark
The defending Player will not be permitted any lateral movement on The Mark. If the defending player moves off The Mark in any direction prior to “Play On” being called, a 50-metre penalty will apply. The defensive team is unable to substitute the Player on The Mark.