Stepping on the line at throw-in

[Adam]

Originally Posted by Jim Henry

I thought I knew this but my partner and I had a friendly discussion at the break last night at a 7th grade game on this throw-in violation.

During a throw-in the thrower steps ON the line. I thought no violation because the line is OOB, but if thrower steps OVER the line, then a violation. But partner says if you step on the line you have broken the plane, therefore violation.

I tried to find the specific rule on this but no luck.

Ask your partner what he does when the boundary line is three feet deep; or there isn't a line so much as a paint color change on the floor.

And there's no "plane" violation for the thrower during a throwin. Note how many players do the endline throwin after a made basket: One foot down OOB, and the other off the floor but hanging over inbounds territory.