There has been some rule updates to the Australian Rules of Polo please see these changes below.

The following Rule will be effective from 3rd April, 2025

IMPROPER BLOCKING

During the execution of a knock-in, Penalty 5.a or 5.b, or a free hit resulting from a ball hit out of bounds, an offensive player may not block a defensive player from marking the offensive players teammate who has a play on the ball (i.e., set a block on the defending player). 

At all other times, when a player in possession of the ball either stops or reduces his or her speed to a slow canter or walk, no teammates of the player in possession may block a defending player within two horse lengths of the player with the ball from making a play on that player or the ball. 

When an offensive player improperly blocks a defensive player, the Umpires shall call a foul and award an appropriate penalty. Improper blocking may or may not constitute Dangerous riding. 

If a violation of this rule is called and not upheld, the team in possession of the ball when the foul was called shall be awarded a Fair Play Drop to team in possession.