Fould poles,In play or not?

[rcaverly]

The fair batted ball did not pass over the fence in-flight unless the foul pole is on or beyond the LBT boundary.

2-5-1 . . . A fair ball is a batted ball which:
g. while over fair ground passes out of the playing field in flight.
1. A fly ball or line drive, which passes over or inside first or third base in flight and curves to foul ground beyond such base, is not a fair hit; but a hit which goes over or through the fence is a fair hit if it is over fair ground when it leaves the field.

2-6-1 . . . A batted or thrown ball is in flight until it has touched the ground or some object other than a fielder.