Section 291
SEC. 291. Whenever the penalty of imprisonment is imposed by the terms of this Act for violation of any of its provisions, it shall be the duty of the Attorney General to institute, in proper cases before the Court of Customs Appeals, proceedings in the ordinary form of criminal prosecutions, for the conviction of the person charged, and that court shall have the power to try and determine the question of the guilt or innocence of the defendant so charged and to impose such sentence as the law warrants in case of conviction, and its decision shall be final. The collection of fines imposed by the court may be enforced by imprisonment, as in case of other crimes or misdemeanors, in accordance with such law as is now, or may be hereafter, provided.