NFHS Balks

[Mi-Umpire]

I had a right handed pitcher working from the stretch position who would look/turn his right shoulder. Why he would look over this shoulder I don' tknow other than the fact it might not be a balk. I thought the rules said any movement other than the head is considered a balk. I was unsure at the time so I didn't call him on it, but now think I should have. Any offical words?

[Edited by Mi-Umpire on May 27th, 2004 at 07:49 AM]