PAFC have issued a statement regarding ground safety In essence, the walls over the entrance/exit tunnels are of a safe height if fans sit in their seats but not if they stand during the game. The club reminds fans they are obliged to sit and presumably there will be enforcement if they don't. That's going to be interesting in the middle blocks of the Devonport End. With ground improvements in the offing, now would be an ideal time to go for safe seating in those areas to allow fans to stand in safety where they currently stand anyway.
Thing is notdistant you have to consider whether Argyle would be done for allowing it or rather enabling people to stand. You know what the FA are like.