33 U.S. Code § 927 - Powers of deputy commissioners or Board
(a) The deputy commissioner or Board shall have power to preserve and enforce order during any such proceedings; to issue subpoenas for, to administer oaths to, and to compel the attendance and testimony of witnesses, or the production of books, papers, documents, and other evidence, or the taking of depositions before any designated individual competent to administer oaths; to examine witnesses; and to do all things conformable to law which may be necessary to enable him effiectively  to discharge the duties of his office.
(b) If any person in proceedings before a deputy commissioner or Board disobeys or resists any lawful order or process, or misbehaves during a hearing or so near the place thereof as to obstruct the same, or neglects to produce, after having been ordered to do so, any pertinent book, paper, or document, or refuses to appear after having been subpoenaed, or upon appearing refuses to take the oath as a witness, or after having taken the oath refuses to be examined according to law, the deputy commissioner or Board shall certify the facts to the district court having jurisdiction in the place in which he is sitting (or to the United States District Court for the District of Columbia if he is sitting in such District) which shall thereupon in a summary manner hear the evidence as to the acts complained of, and if the evidence so warrants, punish such person in the same manner and to the same extent as for a contempt committed before the court, or commit such person upon the same conditions as if the doing of the forbidden act had occurred with reference to the process of or in the presence of the court.
 So in original. Probably should be “effectively”.
Source(Mar. 4, 1927, ch. 509, § 27,44 Stat. 1438; June 25, 1936, ch. 804, 49 Stat. 1921; June 25, 1948, ch. 646, § 32(b),62 Stat. 991; May 24, 1949, ch. 139, § 127,63 Stat. 107; Pub. L. 92–576, § 15(e),Oct. 27, 1972, 86 Stat. 1262.)
As originally enacted, subsec. (b) contained a reference to the Supreme Court of the District of Columbia. Act June 25, 1936, substituted “the district court of the United States for the District of Columbia” for “the Supreme Court of the District of Columbia”, and act June 25, 1948, as amended by act May 24, 1949, substituted “United States District Court for the District of Columbia” for “district court of the United States for the District of Columbia”.
1972—Subsecs. (a), (b). Pub. L. 92–576inserted references to the Board.
Effective Date of 1972 Amendment