CAT II/III and the requirement for LVP's
The airport I most often operate into offers CAT II approaches without enforcing LVP's when cloud base is at or above 200' and vis is at or above 550m.
For example: weather is broken 200' and vis of 10K.....
ATC offer the CAT II approach and apply procedures for protection of CAT II equipment (stop bars, separation, equipment redundancy...etc). However, because the entire airfield is visible from the tower below the cloud, ATC can visually confirm that gates are locked and there are no vehicles/aircraft infringing the protected zones.
It is only when the vis/cloud base conditions deterioriate below 200'/550m that they enforce LVP's.
Essentially, they view procedures for protection of CATII approaches as separate from LVP's. They see CATII protection as a 'high-vis' procedure when vis is at or above 550m and a low vis procedure when vis is below this.
My question is; are they correct?
The ATC section in the Jeppy (section 7.11.4) does refer to CATII/III protection procedures and low vis procedures as separate things. However, my understanding was that LVP's were originally introduced (1988 I think?) with the primary intention of protecting CATII/III approaches and facilitating low vis takeoffs.
I appreciate clarification.