(a) The Director may require, by subpoena, in connection with any investigation or hearing, the attendance and testimony of witnesses and the production of evidence the issuing official in his or her discretion deems necessary to make a determination.
(b) If a person refuses to obey a subpoena issued under paragraph (a) of this section, the Director may petition the United States District Court within the jurisdiction of which the proceeding is being conducted requesting an order requiring compliance with such subpoena.
(c) Witnesses subpoenaed under this section shall be paid the same fees and mileage as are paid for like services in the District Court of the United States. The witness fees and mileage shall be paid by the United States Department of Labor.
(d) Subpoenas issued under paragraph (a) of this section shall be signed by the Director and shall be served either in person by an authorized representative of the Department of Labor or by certified mail, return receipt requested. The date for compliance shall be not earlier than seven (7) calendar days following service of the subpoena. [42 FR 32772, June 28, 1977, as amended at 52 FR 23401, June 19, 1987; 72 FR 37104, July 9, 2007] Sec. 90.15 [Reserved]