BCI = common boa, common Columbian boa, common red tailed boa
BCC = "true" Red Tailed Boa

BCI are often referred to as Red Tailed Boas or Columbian Red Tailed Boas. So unless the person said this snake was a "True" Red Tail, they are still accurate by saying it is a Columbian Red Tail. Confusing, I know. Boa constrictor constrictor is the only "True Red Tailed Boa" and they get a bit larger then boa contrictor imperator. Also, the morphs are only within the BCI sub-species. Most breeders keep the BCC breeding true so the morphs don't crop up in this species. If yours is a pastel, it is BCI.

And he is a handsome fellow!