49 CFR §383.53

1. (a)General rule. Any person who violates the rules set forth in subparts B and C of this part may be subject to civil or criminal penalties under 49 U.S.C. 521(b), as provided in part 386, Appendix B, of this chapter.
2. (b)Special penalties pertaining to violation of out-of-service orders—(1) Driver violations. A driver who is convicted of violating an out-of-service order shall be subject to a civil penalty as stated in part 386 Appendix B, in addition to disqualification under § 383.51(e).
   1. (2)Employer violations. An employer who is convicted of a violation of § 383.37(d) shall be subject to a civil penalty as stated in part 386, appendix B, of this chapter.
3. (c)Special penalties pertaining to railroad-highway grade crossing violations. An employer who is convicted of a violation of § 383.37(e) shall be subject to a civil penalty stated in part 386, appendix B, of this chapter.