If I understand your explanation correctly, that is not 100% true. The boa constrictor subspecies are as follows:
B. c. amarali
B.c. constrictor
B.c. imperator
B.c. longicauda
B.c. melanogaster
B.c. nebulosus
B.c. occidentalis
B. c. orophias
B.c. ortonii
B.c. sabogae
Longicauda is a separate subspecies and is not a "locality specific BCI". The Peru Longtail Boa is a locality specific BCL. While the Hog Island and the Nicaraguans are locality specific BCIs.
Here is a couple helpful links for more information about Boa Constrictor Longicauda with pictures:
http://www.riobravoreptiles.com/boas_long.htm
http://www.cuttingedgeherp.com/boaco...torlongicauda/
For the OP, it is very difficult to determine what subspecies you have without breeding records. There has been a lot of cross breeding between subspecies and many boas on the market today cannot be identified as pure subspecies or localities. Nice looking boas though.