ICAO criteria splits approach categories for segments of an approach,
unlike
TERPs. That is why the teardrop is tighter for A/B than C/D.

The outer X is the turn limit for C/D. The next X inbound is the turn
limit for
A/B and it is also the intermediate fix where all categories can leave
2100 for
1400. The X at 1400 is the FAF and you will note that is where the
descent table
begins for 260 feet per mile descent gradient.

But, that gradient has you crossing the threshold (1 CAG DME) at 91 feet,
which is
about 40-50 feet higher than what the VGSI is likely sited for. It is all
well
below a 3-degree slope, however.

As far as the outer limits of a procedure turn being below the VGSI, what
is
unusual about that? I don't know about Italy but a VGSI in this country
is survey
for obstacles only to 4 miles (VASI) or 3.5 miles (PAPI).


also bear in mind that the process for establishing the glideslope when on
an ILS approach is to join from beneath the glideslope and then track the
glideslope down to DA.

Its the same principle.