running the end line

[Adam]

My understanding of this has always been that the provision is in effect for violations or fouls during the throwin. The throwin ends when the ball is legally touched inbounds. I understand that your state interpreter may have said differently, but mine hasn't.
On my line, it's a spot throw-in until I get something more definitive. I just can't see how this provision can be extended beyond the throw-in.