TYPE includes weather, crew qualification, and ILS ground station and airport facilities.
CAPABILITY relates to the integrity of the auto-flight system.
Some Cat 1 ILS’s are suitable for practice autolands, but approval usually includes an understanding of the pre threshold terrain and the need for the crew to take responsibility for additional monitoring in case of deviation. Similarly for Cat2 /3, just because the ground station and airport facilities are suitable in poor weather this does not mean at all times, particularly if the protected zones are infringed or the ground station is operating single channel.
If a high accuracy, high integrity auto-flight system is flying with a poor quality input (Cat 1, or Cat2/3 unprotected beam) then a high accuracy output cannot be assured – review ILS beam, pre threshold and runway ground profile, and protected zones.
EURO Doc -013 via ICAO (now probably superseded by EASA docs)
6.8 Autoland operations when LVP are not in operation
6.8.1 ILS installations may be subject to signal interference by aircraft and other objects. In order to protect the ILS signal during operations in Low Visibility Conditions the sensitive area is protected during LVP. This ensures that the accuracy of the ILS signal is maintained.
6.8.2 There are a number of occasions when pilots wish to perform autoland operations when LVP are not in operation. These may be for pilot qualification and recency, for operational demonstration and in-service proving flights and for system verification following maintenance. In particular, some aircraft operators recommend that their pilots perform autoland operations routinely in order to reduce pilot work load during marginal MET conditions and after long haul flights.
6.8.3 When LVP are not in operation, it is possible that aircraft and vehicles may cause disturbance to the ILS signal. This may result in sudden and unexpected flight control movements at a very low altitude or during the landing and rollout when the autopilot attempts to follow the beam bends. As a result pilots are advised to exercise caution during these operations according to the instructions provided in their Operations Manual.
6.8.4 Pilots should inform ATC if they wish to conduct an autoland with protection of the LSA. In this case, ATC must inform the pilot if protection of the ILS/MLS sensitive area will or will not be provided. In some States, the hours where practice autolands are permitted are published in the AIP.
Examples from national authorities:-
http://www.caa.gov.qa/sites/default/...uto%20land.pdf
AIP for SWITZERLAND (section AD-1.1) valid from 17 SEP 2015 (para4.5.2)
http://www.pprune.org/tech-log/27905...ml#post3337711