49 U.S.C. § 14909
Disobedience to subpoenas
Whoever does not obey a subpoena or requirement of the Secretary or the Board to appear and testify or produce records shall be fined under title 18 or imprisoned not more than 1 year, or both.
(Added Pub. L. 104–88, title I, § 103 , Dec. 29, 1995 , 109 Stat. 917 .)