CFA is a well established association in the US they have very rigorous standards and rules regarding what can or cannot be shown withing the breed group and they segregate the Siamese breed group by color and coat into six sub-breeds. CFA registers cats Genotypically.
The Cat Fanciers' Association is a non-profit organization founded in 1906, after breaking ties with the American Cat Association. The Association licensed its first cat shows in 1906; one show was held in Buffalo, New York and another show was held in Detroit, Michigan. CFA's first Annual Business Meeting was held in 1907 at Madison Square Garden. In 1906, CFA published the first Stud Book and Register in the Cat Journal. In 1909, Volume I of the Stud Book was published in book form. The Stud Book and Register served as CFA's first published records of cat breeding and lineage as it began a tradition of providing a much-needed service to the cat fancy.