PART III TESTING OF SEEDS-CERTIFYING AUTHORITY AND CERTIFYING AGENCY-OFFICIAL SEED-TESTERS 17. Power to licence Certifying Agency 18. Designation of seed inspectors or testers Section 19. Rolls of official seed-testers, Certifying Authority and Certifying Agency stations 20. Prohibition against testing of prescribed seed except in Certifying Authority or Certifying Agency stations 21. Delivery of samples for official test 22. Reports, licences and other documents of Certifying Authority PART IV INSPECTORS OF SEEDS 23. Inspectors of seeds 24. Duly authorised officers 25. Powers of inspectors or duly authorised officers to take samples of seed 26. Powers of inspectors or duly authorised officers to search premises and seize certain goods 27. Prohibition against obstruction, etc., of inspectors and duly authorised officers PART V LICENSING OF SEED SELLERS 28. Non-application of this Part to seed producers or to registered seed importers 29. Seed seller's licence 30. Application for seed seller's licence 31. Refusal to issue seed seller's licence 32. Revocation of seed seller's licence 33. Appeal to Minister