4v RULES CLARIFICATION:

There is a dashed "build out" line on the field approximately 10 yards from the endline (goal) but not quite the halfline. 

The "rule" that will be enforced by referees is that the players must retreat to the "build out" line during each goalkick. 

There is a "goalbox" but the there is no enforceable rule regarding the goalbox.  The tournament committee advises coaches of young players to NOT designate a "goaltender".