American Football Rules IFAF Approved Ruling 3-1-3:I-IX

I. Other than on the try, Team B scores a touchdown after intercepting a forward pass, intercepting or recovering a backward pass or fumble, or returning a blocked field goal attempt.
RULING: Period and game are ended, and Team B is the winner. [Cited by 3-1-3-e]
II. During the first possession series of a period, Team B intercepts a forward pass, or intercepts or recovers a fumble or a backward pass, and does not score a touchdown. RULING: Team
A’s possession series is ended and Team B starts its series. Team B becomes Team A when the referee declares the ball ready for play. [Cited by 3-1-3-e]
III. During the first possession series of a period, Team A’s field goal attempt is blocked and does not cross the neutral zone. Team A recovers the ball and runs for a touchdown. RULING: Six points for Team A. Team B begins its possession series after the try. [Cited by
3-1-3-e]
IV. Team A’s field goal attempt is blocked and does not cross the neutral zone. A23 recovers the ball and is tackled beyond the line to gain. RULING: Team A retains the ball to continue its possession series. First and 10. [Cited by 3-1-3-e]
V. On first, second or third down, Team A’s field goal attempt is blocked and does not cross the neutral zone. A23 recovers the ball and is tackled short of the line to gain. RULING:
Team A’s ball, next down. [Cited by 3-1-3-e]
VI. During the first possession series of a period, Team B gains possession and then loses possession to Team A, which (a) scores a touchdown; (b) does not score a touchdown. RULING: (a) The score counts. In both (a) and (b), Team A’s possession series ends and Team B begins its possession series. [Cited by 3-1-3-e]
VII. During the first possession series of a period, Team A fumbles into Team B’s end zone on second down of a series. Team B recovers and downs the ball in its end zone. RULING: Team A’s possession series is ended. Team B begins its possession series. [Cited by
3-1-3-e]
VIII. During the first possession series of a period, B10 intercepts a forward pass on his six-yard line and downs the ball in his end zone. RULING: Safety: two points for Team A. Team A’s possession series is over. Team B will put the ball in play, first and 10 on the 25-yard line
at the same end of the field. [Cited by 3-1-3-e]
IX. Team A’s field-goal attempt is untouched beyond the neutral zone until B17 muffs it at the five- yard line. A75 recovers at the three-yard line. RULING: Team A’s possession series continues; first down for Team A at the three-yard line. [Cited by 3-1-3-e]