Article 18Requirements concerning the maintenance of basic mother plants and basic material
1.Basic mother plants and basic material shall be maintained in fields isolated from potential sources of infection by aerial vectors, root contact, cross infection by machinery, grafting tools and any other possible sources.
2.The isolation distance of the fields referred to in paragraph 1 shall depend on regional circumstances, the type of propagating material, the presence of pests in the area concerned and the relevant risks involved as set out by the responsible official body based on official inspection.