According to this post:
3 hours before the game, 3 hours after the game, within the 'Tyne and Wear' region (i.e. as far south as Chester le Street), and one per season ticket.
you can, but that was posted nearly ten years ago.
CLS doesn't quite show up on the Network One map (http://www.networkonetickets.co.uk/zone-map) so it's very possible the boundaries have changed since then.