I think IF that scenario would play out then the club would block and cancel the tickets for all persons with a tier three address and resell them themselves via the ticket exchange. I imagine that if any ticket holder moved into tier three the ticket would be removed from them and it won't be down to them putting them on the exchange.
Can't see the club doing that.
It was raised on the last Forum with PB about people travelling from Kent (Tier 3) to the Southampton game. PB said there would be no checks at the gate, but clearly the 'fan' would be in breach of the ground /supporters regulations and if came to light would expect severe punishment.
Also one fan on the video conference stated that the club have his details as living in tier 3, but is currently away from home in a tier 2 area, and asked if he could attend if got a ticket. The response was that if not in a tier 3 area then yes.
Clearly the club are expecting fans to be responsible and not attend if they live in a tier 3 area, and I would expect this to continue us it became clear that there was widespread breaches.
On the basis thatfans want to see full grounds rather than the current ballot approach I would expect that people would stick to the Government regulations.
So if East Sussex did go to Tier 3, I would expect just to see a deluge of tickets going on the exchange.