1) It doesn't. In normal flight controls law (99.99% of the time) bank angle is limited to 67° with full sidestick roll demand and bank returns to 33° with stick released to neutral (FCOM 1.27.20 P6). In alternate law, bank angle protection is lost but there is no aural warning (tested in sim). Also "Bank angle!" function of EGPWS is not avilable on A320 (1.34.70)
2) My company uses circle-to-land minima for sidestep, per ops manual. Can't say whether it's JAR ops requirement too.