The hypo gene from the Stillwater line may be genetic, but the locality it is named after is not genetic, neither is any locality genetic. The label " hypo " would be perfect to label it as it would be hypo, but then would have lost the locality aspect of it. Like for instance, I have seen an ad where someone outbred a Tx bull to a Stillwater hypo, then bred a pair of babies back together, and then called any hypo baby in that clutch a Stillwater hypo, which they looked vastly different than normal Stillwaters but still very pretty, and then any other baby that was normal looking a Texas het. So that is saying that a clutch of babies can be het for two localities? That does not make sense. And what sucks about it is that the buyer is then misinformed cause the breeder chose to do it that way and sell the offspring labeled as such.
Even the person who brough the Stillwaters to our hobby, John Ginter, will say the same thing, as he and I have had many discussions about this very topic. The Stillwater hypos are a locality morph, and again, snakes can't be het Stillwater or het Kingsville red, etc. The outcross label is what is best to label, IMO.

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Genesis 1:1