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U.S. Code of Federal Regula...
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Title 21-Food and Drugs
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CHAPTER I—FOOD AND DRUG ADM...
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PART 509—UNAVOIDABLE CONTAMINANTS IN ANIMAL FOO...
PART 509—UNAVOIDABLE CONTAMINANTS IN ANIMAL FOOD AND FOOD-PACKAGING MATERIAL
§ 509.3 - Definitions and interpretations.
§ 509.4 - Establishment of tolerances, regulatory limits, and action levels.
§ 509.5 - Petitions.
§ 509.6 - Added poisonous or deleterious substances.
§ 509.7 - Unavoidability.
§ 509.15 - Use of polychlorinated biphenyls (PCB's) in establishments manufacturing food-packaging materials.
§ 509.30 - Temporary tolerances for polychlorinated biphenyls (PCB's).