Sorry salamander, but check ILS-course means what it says: check the course of the ILS in the FMGC. How do you interpret that as check drift angle? The only action the FCOM describes at 350 feet is: 'incorrect selected course at 350ft revert to CATII minima-disconnect ap at 50FT at the latest' or 'check ILS course on PFD'.
Course, not drift. This has, as far as my knowledge goes, nothing to do with the 20kt crosswind limit!