(a) Upon taking physical possession of documentary material, answers to interrogatories, or transcripts of oral testimony delivered pursuant to a civil investigative demand issued under section 3(a) of the Act, the antitrust document custodian designated pursuant to section 4(a) of the Act (subject to the general supervision of the Assistant Attorney General in charge of the Antitrust Division), shall, unless otherwise directed by a court of competent jurisdiction, select, from time to time, from among such documentary material, answers to interrogatories or transcripts of oral testimony, the documentary material, answers to interrogatories or transcripts of oral testimony the copying of which the custodian deems necessary or appropriate for the official use of the Department of Justice, and shall determine, from time to time, the number of copies of any such documentary material, answers to interrogatories or transcripts of oral testimony that are to be reproduced pursuant to the Act.

(b) Copies of documentary material, answers to interrogatories, or transcripts of oral testimony in the physical possession of the custodian pursuant to a civil investigative demand may be reproduced by or under the authority of any officer, employee, or agent of the Department of Justice designated by the custodian. Documentary material for which a civil investigative demand has been issued but which is still in the physical possession of the person upon whom the demand has been served may, by agreement between such person and the custodian, be reproduced by such person, in which case the custodian may require that the copies so produced be duly certified as true copies of the original of the material involved.