Section 331
SEC. 331. Every officer or other person authorized to make searches and seizures by this Act shall, at the time of executing any of the powers conferred upon him, make known, upon being questioned, his character as an officer or agent of the customs or Government, and shall have authority to demand of any person within the distance of three miles to assist him in making any arrests, search, or seizure authorized by this Act where such assistance may be necessary; and if such person shall, without reasonable excuse, neglect or refuse so to assist, upon proper demand, he shall be deemed guilty of a misdemeanor, punishable by a fine of not more than two hundred dollars nor less than twenty-five dollars.