Two 20-minute halves (running clock except in final 2 minutes — clock stops on incomplete pass, out-of-bounds, score, change of possession); 1-minute half-time; OT periods if tied (alternating from 10-yard line); Each possession starts at offense's own 5-yard line
Why people argue about this
People often assume that advancing past midfield automatically wins them the possession instead of just giving it back to the other team, which is a common misunderstanding since they're under 4 downs when crossing midfield. The confusion arises because the rule essentially gives teams another chance at gaining those crucial 10 yards if they can't manage within their remaining downs.
