Referee Supplies This is a Class C license patch from the JBA (Japan Basketball Association) basketball league. I no longer use this patch because I passed the Class B exam the year after obtaining Class C. The condition is as shown in the photos, and I appreciate your understanding. The back has a Velcro-type sticker. It's ready to use. *If you intend to referee a game with this patch, you must take the prescribed training course and pass the exam. Please be aware of this.