custodian The officer before whom the testimony is taken shall certify on the transcript that the witness was duly sworn by the officer and that the transcript is a true record of the testimony given by the witness, and the officer or investigator shall promptly deliver it or send it by registered or certified mail to the custodian. (6) Furnishing or inspection of transcript by witness Upon payment of reasonable charges therefor, the investigator shall furnish a copy of the transcript to the witness only, except that the Attorney General, or the Attorney General's designee in accordance with this Act, may for good cause limit such witness to inspection of the official transcript of the witness’s testimony. (7) Conduct of oral testimony (A) In general Any person compelled to appear for oral testimony under a civil investigative demand issued under subsection (a) may be accompanied, represented, and advised by counsel. Counsel may advise such person, in confidence, with respect to any question asked of such person. Such person or counsel may object on the record to any question, in whole or in part, and shall briefly state for the record the reason for the objection. An objection may be made, received, and entered upon the record when it is claimed that such person is entitled to refuse to answer the question on the grounds of any constitutional or other legal right or privilege, including the privilege against self-incrimination. Such person may not otherwise object to or refuse to answer any question, and may not directly or through counsel otherwise interrupt the oral examination. If such person refuses to answer any question, a petition may be filed in the district court of the United States under subsection (k)(1) for an order compelling such person to answer such question. (B) Compelled testimony If such person refuses to answer any question on the grounds of the privilege against self-incrimination, the testimony of such person may be compelled in accordance with the provisions of part V of title 18, United