Many of you have sent the USGA e-mails regarding Steve Williams taking off his caddie bib on the 18th hole. While it may bother you, it does not have anything to do with playing the game. Therefore, the Rules of Golf does not address attire.
Rules on dress code are made by golf clubs, tours and other organizations. We have the caddies wear the bibs to help the gallery identify the players from a distance. Rocco's caddie has on the yellow bib; Tiger's caddie has on the white bib.