Changes made by Plant Breeders' Rights (Herbaceous Perennials) (Variation) 1993
S.I. 1993/2780
Made to Plant Breeders' Rights (Herbaceous Perennials) 1969
1 change. All changes made by Plant Breeders' Rights (Herbaceous Perennials) (Variation) 1993
From legislation.gov.uk's record of changes, the official one: see it there.