Breed Split?

It appears that in some countries some breeders would like the breed split based on coat type but the registrations to remain open so that breeding between the two can continue. I am assuming that any pups would then be registered based on thickness of coat, ie Irish coat as opposed to heavy coat. How this would work in detail I am not sure but would welcome anyone getting in touch or leaving a message with an explanation. Who would decide which category pups would be registered in? What happens if mistakes are made as it is not always simple to tell which type of coat a baby pup will have when it matures?