Double division lines

We don't have any double division lines but if the gym is small we give them 10 seconds to pass half (the middle line where they take the initial jump to start the game) then they are allowed to move back to the other line.

This is probably less complicated in establishing front court and back court status on multiple turnovers since the line that you use for both to establish front court status is actually in the middle of the gym (the same for both).