Quote Originally Posted by SweetPea View Post
As far as I know, the Ring has an absolute policy against stripping belts. If a fighter doesn't lose the belt in the ring, it's up to the fighter to choose to relinquish the belt.

So I believe that if Calzaghe continues fighting at 175, he can choose to remain the Ring champ at 168 as well.
Here's a direct quote from "The Ring's" website

"The only three occasions when a fighter will lose his championship status are when he retires, moves to another weight division, or is defeated in a championship bout."