Notice and opportunity to postpone interview. At the beginning of the preliminary interview, the interviewing officer shall ascertain that the Warrant Application has been given to the parolee as required by
§ 2.46(b), and shall advise the parolee that he may have the preliminary interview postponed in order to obtain representation by an attorney or arrange for the attendance of witnesses. The parolee shall also be advised that if he cannot afford to retain an attorney he may apply to a U.S. District Court for appointment of counsel to represent him at the preliminary interview and the revocation hearing pursuant to
18 U.S.C. 3006A. In addition, the parolee may request the Commission to obtain the presence of persons who have given information upon which revocation may be based. Such adverse witnesses shall be requested to attend the preliminary interview unless the parolee admits a violation or has been convicted of a new offense while on supervision or unless the interviewing officer finds good cause for their non-attendance. Pursuant to
§ 2.51 a subpoena may issue for the appearance of adverse witnesses or the production of documents.