Two teams of three players each play the game. Each team may have up to 3 additional players (6 total) as substitutes - you will want substitutes. Players are not allowed to use long or goalie sticks. Short sticks must be legal length for division. 
A single goal will be set up in the middle of the field. The objective is for each team to score on its respective side of the goal. Goals are unprotected, with no goalie, keeping the speed and intensity of the game very high. 

The Chumash field is 50 yds. long and 30 yds. Wide.  The 6' high, 12" wide goal is centered in the crease, and the net shall be centered or sandwiched in the frame to accommodate shots from both sides. 20 yds. from the goal line and 5 yds. from the boundary on each end there shall be a dotted restraining or "take back" line.

The net shall be centered or sandwiched in the frame of the goal to accommodate shots from both sides. Each team has a side of the goal to shoot at.  There shall be a restraining or "take back" line 20 yds. from the goal line and 5 yds. inside each end line There is no "safe" zone behind the "take back" line.  A player can be legally pushed out of bounds anywhere on the field.

Chumash is designed to be as self-regulating as possible to enhance the joy of playing, and to make it easy to play a real game of lacrosse anytime, anywhere. You don't have to have a referee, but you do need to exhibit sportsmanship and fair play. If a call is in question, use a system of alternating possessions. The game was created to be fun and to teach skills, to involve parents and encourage them in teaching their children sportsmanship. It is the kind of game we can use to invite the world to play lacrosse with us. Anybody can play.

The game shall be controlled by one official

There are two creases in the game of Chumash.  The first is a regular lacrosse goal crease with a nine-foot radius.  The goal is centered inside this circle.  There is no goalie and it is illegal to "guard" the goal in Chumash. No one can go in the smaller crease unless the ball is down in there.  Then, the player may only pick up the ball and leave immediately.  Failure to do so will result in a technical foul and loss of possession.

The second crease uses the same arc.  The top of the arc is 10-12 yards from the goal line.  Players may move through this larger crease with or without the ball.  They may not stop nor may they shoot from inside the larger or smaller crease.  Players can "dive", but they may not land in the smaller crease ever.  If they do it is no goal and possession is awarded to the other team.

A player may catch a pass inside the larger crease, then step out of it, turn and shoot.