Lane Boundary
 

If a player occupies a marked lane space can he have any part of his body beyond the vertical plane of the lane boundary or edge of any space?

Yes, of course he can, except for his foot. Have you ever called a violation because a player had his arm(s) extended over the lane?

Would you care to rephrase the question? Usually this question is asked about girls' penchant for putting a heel up over the line.

Any part of his body, except his foot.

See 9-1-3g
A player occupying a marked lane space may not have either foot beyond the vertical plane of the outside edge of any lane boundary, or beyond the vertical plane of any edge of the space (2 inches by 36 inches) designated by a lane-space mark or beyond the vertical plane of any edge of the space (12 inches by 36 inches) designated by a neutral zone.

We Solved An Unsolved Mystery Of the Universe ...
 

Is this why girls think they can do this?

You mean the old Statue of Liberty pose? As long as I live, I'll never understand that. It's technically illegal, but I've never seen it called. It looks like it's more of a disadvantage than an advantage.

Unfortunately it's legal to have arms over the line. And both boys and girls seem to be equally guilty of the sword fighting or hand jive thing. It's not a violation. It's usually not enough for a foul. But it is annoying. A brusque, "Knock it off" usually doesn't solve it (oh sure, they're both going to knock it off...just as soon as they win this round). Too bad you can't just smack 'em up side the head. It's quick, it doesn't cost either player a foul, and it would get their attention.

I've found a bit of attention tends to stop this behavior. "When you two are done, we'll get started."

I have done that once or twice. But almost always, in my experience, it begins after the ball is at the disposal of the thrower.

Good lord! Spammers are necrophiliacs, too!