Free Throw Lane Restrictions

[Jurassic Referee]

Originally Posted by jer166

We had our first unit meeting last night. While receiving instruction on the Free Throws Rough Play POE the discussion centered on the statement, "Coaches must not teach players to "lock up" arms along the lane line…

I need some convincing that either of these would support telling players they can only hold their arms straight up or down. What is your take on this and do these rules or any rules support this instruction?

NFHS rule 4-24-6--"It is not legal to extend the arms fully or partially in a position other than vertical so that the freedom or movement of an opponent is hindered when contact with the arms occur. The extensions of the elbows when the hands are on the hips or when the hands are held near the chest are examples of the illegal positions used."

Also see NFHS rule 10-6-1 & 4.