49 U.S.C. § 16104
Disobedience to subpenas
Whoever does not obey a subpena or requirement of the Board to appear and testify or produce records shall be fined under title 18 or imprisoned not more than 1 year, or both.
Whoever does not obey a subpena or requirement of the Board to appear and testify or produce records shall be fined under title 18 or imprisoned not more than 1 year, or both.