An entire game for the NAIG field lacrosse tournament will consist of four (4) periods, each of twenty (20) minutes duration. "Time off" incurred in each quarter shall be added to the playing time of that quarter.

During the last 3 minutes of the fourth quarter, and during any overtime period, the game clock and, if applicable, the penalty clock(s) shall stop whenever the ball becomes dead, and they shall restart whenever play is started. This shall apply for all stoppages, including the scoring of a goal.

At the end of each quarter, the teams shall change ends. The interval between the first and second quarters shall be of 2 minutes duration. At half time the interval shall be 10 minutes long. At three quarter time, the interval shall be 3 minutes.

In the event of the score being tied at the end of regulation playing time, then 2 periods of overtime shall be played.