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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 7
Chapter I
Part 91
Subpart E - Subpart E—Samples
§ 91.19 - General requirements of suitable samples.
§ 91.20 - Shipping.
§ 91.21 - Protecting samples.
§ 91.22 - Disposition of analyzed sample.
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