Touching Lines on a Throw-in

[Jurassic Referee]

Originally posted by BktBallRef

After a made or awarded basket - legal.

During a spot throw-in - illegal.

The thrower must remain on or over the throw-in spot or it's a violation. If he jumped across the boundary line, then he's no longer over the 3' spot that's OOB.

Say what?

Casebook play 7.6.2 sez that "it is permissible for the thrower to move backward or forward within the 3-foot-wide designated area without violating...". Casebook play 4.42.6 also mentions the designated spot as only requiring the thrower to keep any portion of his body on or over the 3-foot width of the designated spot.

There's no rule that I know of that says that the designated spot is limited to the boundary line at the front, as well as a set distance to the back, except that they can't climb the bleachers. There's nothing in rule 9-2 that's being violated that I'm aware of either. If I'm missing something, can you please point me to the rule that I'm missing?