A Code of Honor, Not a Referee, Keeps Curlers Honest; New York Times, 1/23/14

Mary Pilon, New York Times; A Code of Honor, Not a Referee, Keeps Curlers Honest:

"Curling is the rare Olympic sport that largely relies on self-policing. Historically seen as a gentleman’s game, curlers are expected to call attention to their own errors.

While some officials line curling arenas, they are chiefly relegated to timekeeping and measuring tasks around the button, or bull’s-eye, of the game’s court. Curlers at the amateur and elite levels are expected to admit their own infractions, be they swearing, touching a moving stone with their foot or broom slamming, a practice that is frowned upon."