Not for this section of rule. This section is ENTIRELY about control, then once you’ve used the rule to decide who has control you look at the feet to decide where they had control. But for the joint possession issue feet don’t matter.
Here’s the rule:
The player who first controls and continues to maintain control of a pass will be awarded the ball even though his opponent later establishes joint control of the ball.
http://www.nfl.com/rulebook/forwardpass
Notice no feet. Just control. Jennings established control and maintained control while Tate established joint control. It happened just like the rule is written, Jennings had control. From there you look at his feet, if they hit inbounds INT and touch back, if not out of bounds, which of course end of the game that doesn’t matter. But that’s when feet become an issue.
You wont find it in any rule book. Possession doesn’t begin till you hit the ground.