The Cat Fanciers' Association (CFA) and the World Cat Federation (WCF) are the only major registries that recognize them as a standalone breed. In other registries, they are part of the Siamese or Oriental Shorthair breeds (and may not be accepted as show and breeding quality, depending on what colors the registry permits in these breeds, and whether they permit any outbreeding in the lineage). Because these cats are a crossbreed, various registries are resistant to accepting either as breeds, or as valid Siamese.