Can the Kai earings(Potara Earings) be used again and again to keep fusing individuals? Supreme Kai and Kibito fused using the Kai Earrings. Can now Kibito Kai use the earrings again to fuse with another?

I searched for this and found no creditable source.

I know for a fact that the ear rings still work, since they were offered by Kibito Kai to Goku and Vegeta before the battle against Kid Buu. However they destroyed it. So could Kibito Kai use it to fuse again?

Edit: Accepted answer has added a somewhat relevant frame. It doesn't make it explicit but seems to indicate that fused individuals such as Elder kai, Kibito Kai and Vegeto can no longer fuse again.
The Rou Kaioshin says that you can only fuse once. But the way it's worded it could mean that the person you once was can't fuse with another because you won't be yourself anymore. I.E. Goku can only fuse once because afterwards he won't be Goku anymore.




  Rou Kaioshin: "Also, you can use the Potara only once in your lifetime!"
  
  Goku: "Oh... Did you use it with someone else too...?"


Chapter: 502 (DBZ 308), P1.4

^Above is the VIZ big translation. I have added the raw panel as well just in case you want the Japanese. I don't have a translation for it myself. Sorry.