what is uncategorized ILS, now that you've talked about it, the one in LSZH?
AFAIK, it's an ILS that does not meet any of the formal categories (1, 2 or 3) and will typically have a DH above 200 feet. I'm not familiar with LSZH but, if the DH is in the vicinity of 300 feet or more, the reason will most likely be terrain in the vicinity of the final approach/take-off area.