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Regulations last checked for updates: Aug 19, 2026
Title 27 - Alcohol, Tobacco Products and Firearms last revised: Aug 17, 2026
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.
authority:
26 U.S.C. 7805.
source:
T.D. ATF-198, 50 FR 8535, Mar. 1, 1985, unless otherwise noted.
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