U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 21Chapter IPart 20Subpart B - Subpart B—General Policy
View all text of Subpart B [§ 20.20 - § 20.34]
§ 20.25 - Retroactive application of regulations.

The provisions of this part apply to all records in Food and Drug Administration files.

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