This topic was posted a long time ago, but I believe it's still relevant.
Common bond was in the Bell System Practices, I'm not sure what all BICSI copied over, I know they did a lot of it, but all that could have changed. I'm not at all familiar with BICSI Standards. I would think common bond is still a followed practice. To me it's just common sense to have no difference in potential in the grounds.
EDIT: To add, I don't recall common bond ever being in the NEC.
