rules on square backboard

[hatrick]

In Michigan, would someone please help me on the following rule?

In high school basketball, if the ball hits on top of the square backboard and either (bounces once or twice) and comes back towards the front, is that allowed. I know on a fan shaped it is allowed.

The shot came from the front.

If you know the rule number please inform, I do not have a rule book available so if you know of a website you can direct me to that would be great.