39 C.F.R. § 958.11
Except as provided in this section, after receiving the Notice of Docketing and Hearing the respondent may review and obtain a copy of all relevant and material documents, transcripts, records, and other materials which relate to the determination of liability by the Determining Official under 39 U.S.C. 3018 , and all exculpatory information in the possession of the Determining Official relating to liability for civil penalties, clean-up costs and/or damages for mailing hazardous materials and/or related violations under 39 U.S.C. 3018 . The respondent is not entitled to review or obtain a copy of any document, transcript, record, or other material which is privileged under Federal law. The Presiding Officer is authorized to issue orders placing limitations on the scope, method, time and place for accessing this information, and provisions for protecting the secrecy of confidential information or documents.
39 C.F.R. §958.11