BOAC:
What is this issue with circling off 19? If there were minima published (and it would probably be 8240 - but missing as Aterp explained) there should be no 'terrain' issue at all. This shows a basic misunderstanding of what a circling area is.
There is no issue with publishing CTL on the LPV 19. The issue is FAA policy. They used to publish CTL on an IAP with precision-only minimums, or Decision Altitude only, if you will. They changed the policy some three or four years ago. There apparently is an obstacle or obstacles that interfere with a 3-degree gradient LNAV path and a 3-degree VNAV path. LPV uses far different containment areas; basically ILS criteria with their "troughs."
How far away is recognition of LPV in ICAO? As OK says, why no LNAV for 19? Mind you, we may not have seen all the plates?
No idea about ICAO on this.
As to LNAV it may have worked with a steeper descent gradient but that would require a second IAP (Y and Z), which the FAA presumably didn't want to do at this location. Or some obstacle to the left or right of the ILS/LPV lateral areas caused LNAV too steep to meet criteria. Can't tell without the FAA work records.