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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
All Titles
Title 27
Chapter I
Part 30
Subpart C - Subpart C—Gauging Instruments
§ 30.21 - Requirements.
§ 30.22 - Hydrometers and thermometers.
§ 30.23 - Use of precision hydrometers and thermometers.
§ 30.24 - Specific gravity hydrometers.
§ 30.25 - Use of precision specific gravity hydrometers.
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