Del. Code tit. 11 § 4351
The Board may issue subpoenas requiring the attendance of such witnesses and the production of such records, books, papers and documents necessary for investigation of the case of any person before it. Subpoenas may be signed and oaths administered by any member of the Board. Subpoenas so issued may be served by Department employees or by any person authorized to serve subpoenas by the Rules of Civil Procedure of the Superior Court and shall be served and returned as provided by said Rules. The fees of witnesses shall be the same as allowed in the Superior Court and shall be paid by the State Treasurer from any moneys in the Treasury of the State not otherwise appropriated, upon a warrant signed by a member of the Board and its Secretary. Any person who testifies falsely or fails to appear when subpoenaed, or refuses to produce such material pursuant to the subpoena, shall be subject to the same orders and penalties to which a person before said Court is subject. The Superior Court, upon application of the Board, may in its discretion compel the attendance of witnesses, the production of such material and the giving of testimony before the Board, by an attachment for contempt or otherwise in the same manner as production of evidence may be compelled before such Superior Court.
11 Del. C. § 4351