7-2-2-a Exception 2

On fourth down before a change of team possession, when a Team A fumble is caught or recovered by a Team A player other than the fumbler, the ball is dead. If the catch or recovery is beyond the spot of the fumble, the ball is returned to the spot of the fumble. If the catch or recovery is behind the spot of the fumble, the ball remains at the spot of the catch or recovery.

7-2-5-b

b. Fumble.
When a fumble comes to rest inbounds and no player attempts to secure it:
1. In advance of the spot of the fumble, the ball belongs to the fumbling team at the spot of the fumble.
2. Behind the spot of the fumble, the ball belongs to the fumbling team at the dead ball spot.

8-3-2-d-5

d. The try ends when:
1. Either team scores.
2. The ball is dead by rule (A.R. 8-3-2-IV and VI).
3. An accepted penalty results in a score.
4. A Team A loss-of-down penalty is accepted (Rule 8-3-3-c-2).
5. A Team A player fumbles and the ball is caught or recovered by any Team A player other than the fumbler. There is no Team A score (A.R. 8-3-2-VIII).