Polo Rules

I've been having a search for what constitutes acceptable mallet-on-mallet play. Found this on an American site;

-Hooking some ones mallet with your mallet, to pull it away from the ball should be legal.

-Hooking a mallet out from someone while they're resting on it so they foot down should be legal.

-Lifting some ones mallet from underneath to interfere with a shot, or to take a ball away should be legal.

-Pinning a mallet down so the shooter or person with possession cant swing their mallet should be legal.

SWATTING A MALLET WITH A HACKING MOTION, OR DOWNWARD SWING SHOULD NOT BE LEGAL.

Is that pretty much the consensus?