39 C.F.R. § 9.3 Public availability of communications.
Title 39 - Postal Service
All communications placed on the public record pursuant to these guidelines shall be available for public inspection at the Office of the Board of Governors, United States Postal Service, Room 10–300, 475 L'Enfant Plaza West, SW., Washington, DC 20260–1000, between 8:30 a.m. and 4:30 p.m., Monday through Friday except Federal holidays.
Title 39: Postal Service
PART 9—POLICY ON COMMUNICATIONS WITH GOVERNORS OF THE POSTAL SERVICE DURING PENDENCY OF RATE AND CLASSIFICATION PROCEEDINGS [APPENDIX]
§ 9.3 Public availability of communications.

