; and (ii) transcripts of oral testimony shall be available for examination by the person who produced such testimony, or by a representative of that person authorized by that person to examine such transcripts. (3) Use of material, answers, or transcripts in other proceedings Whenever any attorney of the Department of Justice has been designated to appear before any court, grand jury, or Federal agency in any case or proceeding, the custodian of any documentary material, answers to interrogatories, or transcripts of oral testimony received under this section may deliver to such attorney such material, answers, or transcripts for official use in connection with any such case or proceeding as such attorney determines to be required. Upon the completion of any such case or proceeding, such attorney shall return to the custodian any such material, answers, or transcripts so delivered which have not passed into the control of such court, grand jury, or agency through the introduction thereof into the record of such case or proceeding. (4) Conditions for return of material If any documentary material has been produced by any person in the course of any investigation pursuant to a civil investigative demand under this section, and— (A) any case or proceeding before the court or grand jury arising out of such investigation, or any proceeding before any Federal agency involving such material, has been completed, or (B) no case or proceeding in which such material may be used has been commenced within a reasonable time after completion of the examination and analysis of all documentary material and other information assembled in the course of such investigation, the custodian shall, upon written request of the person who produced such material, return to such person any such material (other than copies furnished to the investigator under subsection (g)(2) or made for the Department of Justice under paragraph (2)(B)) which has not passed into the control of any court, grand jury, or agency through introduction into the