The parent/national breed club makes that determination. Members of The Labrador Retriever Club would have to initiate the effort to change the breed standard to create separate color varieties. It's a huge undertaking to change a breed standard so unless there is a determined, coordinated effort supported by a majority of the members, it won't happen. English Cockers have black, red and liver solids, and black/white, liver/white, red/white in roans and parti-color and none of them are separated by varieties
I'd loved to see a retriever win the group tonight and go on to BIS, my preference being the golden. I think the closest a golden has come to BIS is winning the group some time ago so still waiting for that first BIS.
My favorites so far have been the OES and the Xolo. They really have that ring presence that says, this is MY show.