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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
All Titles
Title 1
Chapter I
Part 21 - PART 21—PREPARATION OF DOCUMENTS SUBJECT TO CODIFICATION
Subpart A [§ 21.1 - § 21.35] - Subpart A—General
Subpart B [§ 21.40 - § 21.53] - Subpart B—Citations of Authority
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