One of the toughest calls for any referee to make is determining the difference between an offensive player charging into a defender versus the defender blocking the path of an offensive player.
Recently the charge/block call has become even tougher to get right due to defenders trying to draw a foul by flopping to exaggerate contact.
This fall the charge/block foul will be governed by an additional factor. Defenders will have to establish their position before a player begins his path to the basket, and do so outside the area between the backboard and the rim. In other words, the rule change is similar to the NBA rule on this type of play.
One big difference.
NBA courts have the restricted area painted on the floor to assist refs making the appropriate call. The NCAA rule calls for an imaginary line. That's right. Rather than require schools to paint a line on the floor to mark the restricted area, refs are instructed to use their imagination.