I know, I know. This has been posted before, but I haven't found any recent posts about CBS that reference logging in with your provider. It appears that they might have TV Everywhere in some of their markets now. This link shows that you can log in with your provider info to access a live stream of CBS in select markets. I verified in Chicago that it does not require you to log into a CBS All Access account and has a different city list than what CBS All Access offers for live streams.
With this in mind, do you think it might be possible to add CBS to the locals beta?