I had this come up just a few months ago in a VNEA tournament. The other player touched the cue ball getting ready to break so I called foul, he argued and so we called a ref to get the verdict, this is what the ref had to say " at any time when you have BIH or have the break and have not broken yet, until you get into your shooting stance, touching the cueball with your tip is NOT a foul." So basically if you have BIH and are just standing there you can push the cueball all over the table with your tip, but once you get into your shooting stance, any contact with the cueball with your tip is a foul. I personally think this is freaking ridiculous because who is to say when someone is in their "official shooting stance" it needs to be clarified better in my opinion. This ruling came from Dave Rodgers...one of the head refs in Vegas for VNEA.