How hard would be rule possession if order reversed?

[Robert Goodman]

The reason I asked the question was to see how hard this rule would make it on the officials in my pro league. Some of the things I'd have would eliminate hard calls, others would introduce them, and sometimes, as in this case, I don't know whether officials would find it easier or harder. What this rule would do would cause the field to play as if it were a little bit larger than marked. If the ball subsequently became dead out of bounds (as by having a player gain possession & then touch first OOB), the dead ball spot would be where it crossed the sideline rather than position at the time it became dead.

However, it would apply no matter whether a player was entering or exiting the playing area. If entering, they would have to "establish" as in basketball, though not necessarily identically to however they rule that.