I will normally complete at least one automatic approach/land maneuver (autoland) per week, to check the function of the system.
No restriction on the type of ILS installation...IE: a category one (or more) ILS installation is all that is required, however...the glidepath threshold crossing height (published on most approach charts) must be at least 42 feet, to allow sufficient main gear clearance from the approach lights.
Type, L1011.