Contrary to what Superpilot just posted, some AFM specifically require CAT 1 ILS to be approved before use for practice.
GENERAL
The following operations are prohibited:
− MLS;
− ILS beam not coincident with the central axis of the runway;
− Autoland for an ILS CAT I, unless operators interrogate the airport
authorities on ILS ground equipment quality and on experience with
other operators. The operators should check with the authorities
that specific restrictions do not apply at airports with CAT I only
capability. Terrain profile before the runway threshold has also to
be considered.