49 U.S.C. § 11905
Disobedience to subpoenas
A person not obeying a subpoena or requirement of the Board to appear and testify or produce records shall be fined at least $100 but not more than $5,000, imprisoned for not more than one year, or both.
(Added Pub. L. 104–88, title I, § 102(a) , Dec. 29, 1995 , 109 Stat. 852 .)