Regarding changes in timeline for tracking permissions

Per https://developer.apple.com/news/?id=hx9s63c5 the point when apps will have to acquire permission to track is moving forward to "early next year". Based on this what are the implication of linking against the app tracking transparency framework ahead of that date?

Do we have to remove any code using the framework ahead of the Xcode GM or can we leave it dormant until 2021?