CFR›Title 39›Chapter III›Part 3065 ContainsSections 3065.1–3065.3CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 3065—RULES FOR LETTERS CARRIED OUT OF THE MAIL Sections 3065.1 § 3065.1 Applicability and scope. 3065.2 § 3065.2 Prohibition on new regulations. 3065.3 § 3065.3 Procedure for seeking clarification or interpretation. Authority39 U.S.C. 503, 601.Source87 FR 42074, July 14, 2022, unless otherwise noted. Previous 3060 Part 3060—Accounting Practices and Tax Rules for the Theoretical Competitive Products Enterprise