essentially derived plant variety "essentially derived plant variety" means a plant variety which— (a) is predominantly derived from the initial plant variety, or from a plant variety that is itself predominantly derived from the initial plant variety, while retaining the expression of the essential characteristics that result from the genotype or combination of genotypes of the initial plant variety; (b) is clearly distinguishable from the initial plant variety; and (c) except for the differences which result from the act of derivation, conforms to the initial plant variety in the expression of the essential characteristics that result from the genotype or combination of genotypes of the initial plant variety; ACT 634 - PROTECTION OF NEW PLANT VARIETIES ACT 2004 2. Interpretation.