Rule Number 32
ILLEGAL SCREEN
An illegal screen is when a player actively impedes the progress of an opposing player, except where:
.1 Both players are competing for the ball; or
.2 The opposing player is in possession of the ball;
or
.3 The opposing player is within three (3) meters of the ball and is the nearest player to the ball, where the ball is on the water and not in the air; or
.4 Both players are jostling within the six (6) meter area.
.5 A player is considered to be actively impeding the progress of an opponent when their kayak is moving and/or they are attempting active paddle strokes.