new rule

[ATXCoach]

When coaching my team to trap the dribbler on the sideline, I and almost every other coach I have ever known tells their player to put a foot out of bounds so that the dribbler can't get by. The defender has 75% or more of their body over the court, but does have a foot on the line.

Is this now a violation on the defense that officials are looking to call? Please explain why or why not so I may better understand the intent?

If it is not a violation on the defense, would it be a violation on the dribbler who jumped from inbounds to out-of-bounds to avoid contact and passed in the air - and then immediately returned to the court?