The list can use Art (S)...
Only if mounted on PF tower or if invading and opponent could have PF.
How the heck does this work?
1. What's the cost of a PF tower? By my calculations it's 10AP: 1AP for each side for PF, +1AP for each side for being an outside wall of a PF tower, +2 for one side having a gate.
2. Why the qualification about opponents needing to have PF? As I understand it every army
can use PF, it's just that virtually no one does.