{"data":{"id":"us/9-cfr-101.7","jurisdiction":"us","citation":"9 CFR 101.7","heading":"Seed organisms.","body":"When used in conjunction with or in reference to seed organisms, the following shall mean:\n(a) Master Seed. An organism at a specific passage level which has been selected and permanently stored by the producer from which all other seed passages are derived within permitted levels.\n(b) Working Seed. An organism at a passage level between Master Seed and Production Seed.\n(c) Production Seed. An organism at a specified passage level which is used without further propagation for initiating preparation of a fraction.","path":["Title 9—Animals and Animal Products","CHAPTER I—ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE","SUBCHAPTER E—VIRUSES, SERUMS, TOXINS, AND ANALOGOUS PRODUCTS; ORGANISMS AND VECTORS","PART 101—DEFINITIONS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-9.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:03Z","sha256":"3b24a37344e8490b3902bf46e09ac6f0ee40a894336fedd26f6def8317ee74e8","source_id":"us-cfr","stale":true,"prev":"us/9-cfr-101.6","next":"us/9-cfr-102.1"},"notice":"GroundRules: Original legal text. Not legal advice."}