To amend title 39, United States Code, to grant the United States Postal Service the authority to issue civil investigative demands, and for other purposes.

[AI summary unavailable — showing source text] Authorizes the Postmaster General, whenever there is reason to believe that any person may be in possession, custody, or control of any documentary material or may have information relevant to an investigation of a matter arising under Federal postal law, to issue in writing and cause to be served upon such person before the commencement of a civil or criminal proceeding thereon, a civil investigative demand requiring such person to: (1) produce such documentary material for inspection and copying or reproduction; (2) answer in writing written interrogatories; (3) give oral testimony concerning such material or information; or (4) furnish any combination of such material, answers, or testimony. Requires the Postmaster General to designate an agent to serve as custodian of documentary material, answers to interrogatories, and transcripts of oral testimony received, and such other necessary additional agents to serve as deputies to the custodian. Authorizes the custodian to deliver to the Federal Trade Commission, upon written request, copies of such material, answers, or transcripts for use in connection with an investigation or proceeding under the Commission's jurisdiction to be u…