Does Removing the Caseback Void the Warranty?

[Calgaryjim]

I searched and couldn't find this here, and before that I did a google search on my question - what I found varied and none of it was from Rolex. Some sources say just removing the case-back voids the warranty, some said it only voids the warranty if repairs were done other than by Rolex or their authorized service centers. Does anyone know for sure?