thereto. 3. (1) Potato seed is hereby prescribed to be seed to which the Act applies. Act to apply to potato seed (2) No potato shall be sold as seed unless it has been certified by the Controller of Seeds in accordance with these Regulations. (3) No potato seed shall be certified under these Regulations unless it has been produced and inspected, and attains the standards, as herein provided. 4. (1) Only cultivars which have been approved by the Controller of Seeds shall be eligible for certification. Certification of potato seed (2) Potato seed shall be certified in six classes in accordance with the First Schedule. (3) The standards for certification shall be in accordance with the Second Schedule. 5. (1) An application for registration as a grower of potato seed shall be Registration as made in accordance with Part VIII of the Act. grower (2) An application shall not be approved if it is in respect of land on which, during the preceding three years, potatoes or other Solanaceous crops have been grown. 6. The grower shall plant the class of seed appropriate for his production; and shall retain such evidence of that class as may be sufficient to satisfy the Certifying Authority in that behalf. Evidence of class of seed grown 7. (1) An inspector carrying out a field inspection shall reject a crop for Field inspection certification if he is satisfied that(a) the crop is so heavily contaminated with weeds as to render it