45 CFR 702.7 - Counsel.
(a) Persons compelled to appear in person before the Commission and any witness appearing at a public session of the Commission will be accorded the right to be accompanied and advised by counsel, who will have the right to subject their clients to reasonable examination, make objections on the record, and briefly argue the basis for such objections.
(b) For the purpose of this section, counsel shall mean an attorney at law admitted to practice before the Supreme Court of the United States or the highest court of any State or Territory of the United States.
(c) Failure of any persons to obtain counsel shall not excuse them from attendance in response to a subpoena, nor shall any persons be excused in the event their counsel is excluded from the proceeding pursuant to § 702.6(g). In the latter case, however, such persons shall be afforded a reasonable time to obtain other counsel, said time to be determined by the Commission.