[Code of Federal Regulations] [Title 21, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR3.4] [Page 43] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 3_PRODUCT JURISDICTION--Table of Contents Subpart A_Assignment of Agency Component for Review of Premarket Applications Sec. 3.4 Designated agency component. (a) To designate the agency component with primary jurisdiction for the premarket review and regulation of a combination product, the agency shall determine the primary mode of action of the product. Where the primary mode of action is that of: (1) A drug (other than a biological product), the agency component charged with premarket review of drugs shall have primary jurisdiction; (2) A device, the agency component charged with premarket review of devices shall have primary jurisdiction; (3) A biological product, the agency component charged with premarket review of biological products shall have primary jurisdiction. (b) The designation of one agency component as having primary jurisdiction for the premarket review and regulation of a combination product does not preclude consultations by that component with other agency components or, in appropriate cases, the requirement by FDA of separate applications.