; and (II) if the refusal is on grounds of the privilege against self-incrimination, the testimony of such person may be compelled in accordance with the provisions of section 6004 of title 18, United States Code. (E) Transcripts For purposes of this subsection— (i) after the testimony of any witness is fully transcribed, the Agency investigator shall afford the witness (who may be accompanied by an attorney) a reasonable opportunity to examine the transcript; (ii) the transcript shall be read to or by the witness, unless such examination and reading are waived by the witness; (iii) any changes in form or substance which the witness desires to make shall be entered and identified upon the transcript by the Agency investigator, with a statement of the reasons given by the witness for making such changes; (iv) the transcript shall be signed by the witness, unless the witness in writing waives the signing, is ill, cannot be found, or refuses to sign