A plant variety is an essentially derived variety of another plant variety if:
(a) it is predominantly derived from that other plant variety; and
(b) it retains the essential characteristics that result from the genotype or combination of genotypes of that other variety; and
(c) it does not exhibit any important (as distinct from cosmetic) features that differentiate it from that other variety.
Note: For declarations of essential derivation, see sections 40 and 41D.