; except that all powers, rights, and duties conferred or imposed by the customs laws upon any officer or employee of the Treasury Department may, for the purposes of this Act, also be exercised or performed by the Secretary or by such persons as the Secretary may designate: Provided, That any warrant for search or seizure shall be issued in accordance with rule 41 of the Federal Rules of Criminal Procedure. (c) Storage cost Any person convicted of an offense, or assessed a civil penalty, under section 4 shall be liable for the costs incurred in the storage, care, and maintenance of any donkey, donkey hide, or product containing ejiao seized in connection with the violation concerned. (d) Civil forfeitures Civil forfeitures under this section shall be governed by the provisions of chapter 46 of title 18, United States Code. 6. Enforcement (a) In general The provisions of this Act and any regulations issued pursuant thereto shall be enforced by the Secretary, the Secretary of Transportation, or the Secretary of the Treasury. Such Secretary may utilize by agreement, with or without reimbursement, the personnel, services, and facilities of any other Federal agency or any State agency or Indian tribe for purposes of enforcing this Act. (b) Powers (1) In general Any person authorized under subsection (a) to enforce this Act— (A) may carry firearms; (B) may, when enforcing this Act, make an arrest without a warrant, in accordance with any guidelines which may be issued by the Attorney General, for any offense under the laws of the United States committed in the person’s presence, or for the commission of any felony under the laws of the United States, if the person has reasonable grounds to believe that the person to be arrested has committed or is committing a felony