Its not like the ICC has changed their guidelines for bats because of the IPL. The bat is within the ICC's stipulated rules. Its just an innovation that they are trying. Its not wrong even if they try it in ICC events as long as it is within the guidelines.
Waiting to see what Haydos does with this bat. He has been a terror for CSK in both seasons and its because of him that CSK has gone as far as they have done so far. I hated the guy while he wore Aussie colors, but after his stint with CSK, I am a huge fan of him. Hope he continues his terrorising from and goes a step ahead and wins us the trophy this time.