Which organization cemented the divergence by formally recognizing the White Shepherd as a separate variety?

Answer

The United Kennel Club (UKC).

The divergence between the standard-colored German Shepherd and the white variant was formally cemented through the recognition actions of specific kennel clubs. The United Kennel Club (UKC) is noted for granting formal recognition to the white dogs as a separate breed or variety, often using the designation 'White Shepherd.' This recognition signified that while the ancestry was shared with the GSD, these dogs were subsequently judged against a different standard that explicitly accepted the white coat color, leading to documented separation in pedigree records.

Which organization cemented the divergence by formally recognizing the White Shepherd as a separate variety?
evolutionDogwhitebreedGerman Shepherd