 A failed attempt would result in the scored-upon team taking possession at the final spot of the ball.This play could only be attempted if the scoring team was trailing by at least 17 points at any time in the game, or during the last 2 minutes of the first half or last 5 minutes of the game.The onside conversion was also available to the scored-upon team following a safety (with the same restrictions regarding score and/or time remaining), with the spot of the play being that team's own 18-yard line and the required distance to gain being the same 12 yards.