[M&M Guy]

In NCAA-W, the trail is still responsible for the sideline OOB call, even though it's the L's area of coverage. If the T doesn't see it because they're watching their area, or the post play, they can ask for help from the L, because the L would be on-ball in that case.

As far as confusion between T and L as to who's watching what, I haven't found that to be too much of a problem. The mechanic is for the L to "square up" to the play to show the T they now have on-ball, and that tells the T to cover the post play. For example, say the ball rotates to C's side and stays; C stays with the matchup. L rotates over, but continues to look in the paint and cover the post play, while the new T continues to watch on-ball. Once the L is ball-side, they will continue to watch post play if the old C/new T has a count or a drive. Once there is no immediate action, the L will "square up" to the play, which tells the T they now have off-ball action while the L has on-ball.

It sounds a little strange at first, but I guess like anything, once you get used to it, it's pretty straight forward and easy.