opinion: OPINION OF THE COURT
  PER CURIAM.
  The appellant, Martin W. Rudolph, was tried and convicted before the district court, sitting without a jury, of transporting property in interstate commerce without having obtained a certificate of convenience and necessity as required by 49 U.S.C. § 306(a). Such conduct is criminal if knowingly and willfully committed, 49 U.S.C. § 322(a).
  At the request of appellant, this appeal was submitted to the court on briefs. We have reviewed the record in the light of the alleged errors; we can perceive no error in the district court’s conclusion that appellant knowingly and willfully violated 49 U.S.C. § 306(a). See Steere Tank Lines, Inc. v. United States, 330 F.2d 719 (C.A.5, 1963). We also fail to discern any reliance by the district court on appellant’s failure to testify as a basis for his guilt.
  The judgment of conviction and order denying the motion for a new trial by the district court will be affirmed.