What kind of baseballs are legal in Illinois high school baseball?

What brand and size and weight of baseballs are legal in high school baseball in Illinois?

Public Comments

1. any major league ball.
2. If you are playing under NFHS (National Federation of High School Associations) you can't use a Major League ball. The second answer kinda sucks also, it was reported as spam. I'm pretty sure Illinois plays "Fed" ball. If so, the balls must have a NFHS approval stamprd on the ball. There are size standards and COR standards, and a paragraph worth of description in the rule book, but I (and I am a certified official) just need to see the NFHS mark on the ball for it to be legal. http://www.nfhs.org/custom/amark/Default.aspx has all the details you need, and a list of manufacturers who can provide legal balls.