"Does your aircraft have de-icing systems? Is it certified for flight in icing conditions? If so then where is the problem? Yes you can land in FZRA".
No, not necessarily so.
Check the AFM approval for flight in icing conditions; this may not apply to all takeoff conditions and probably not FZRA or drizzle, both of which might also depend on a clear aircraft policy following de/anticing. Also check holdover tables / allowable conditions.
Approach and landing in FZRA may be subject to a separate AFM clearance, but normally this would not approve flight in severe icing conditions which could easily be the case for FZRA.
See EASA CS 25 icing certification and Appx C.