Final answer:
A Category II ILS pilot authorization is usually limited to specific minimum weather conditions and runway visibility requirements upon initial issuance.
Step-by-step explanation:
A Category II ILS pilot authorization, when originally issued, is normally limited to certain minimum weather conditions and runway visibility requirements. This limitation is due to the increased precision required for lower-visibility landings and the need for pilots to have additional training and proficiency. Category II approaches allow pilots to land in poorer visibility conditions compared to a standard Category I ILS approach, but with these initial limitations, pilots are required to adhere to specific operational criteria and must usually maintain higher minimums until they have gained sufficient experience and the operator's procedures have been assessed as satisfactory.