No date yet. They're still trying to figure out some of the finer details.
There's some real stupid stuff they are looking at, like having to watch something on Netflix at home once per month or your device gets blocked. Considering that many people will only watch Netflix on a device if they are travelling, it means so many people will lose access to Netflix.
It's a bit of a smart move though. They will lose a bunch of subscribers, but they'll gain more overall because people who borrowed accounts will realise that they want to keep watching these shows.