[Code of Federal Regulations] [Title 21, Volume 1] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR20.25] [Page 199] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 20--PUBLIC INFORMATION--Table of Contents Subpart B--General Policy Sec. 20.25 Retroactive application of regulations. The provisions of this part apply to all records in Food and Drug Administration files.