[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR1271.225] [Page 734] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 1271_HUMAN CELLS, TISSUES, AND CELLULAR AND TISSUE-BASED PRODUCTS --Table of Contents Subpart D_Current Good Tissue Practice Sec. 1271.225 Process changes. Any change to a process must be verified or validated in accordance with Sec. 1271.230, to ensure that the change does not create an adverse impact elsewhere in the operation, and must be approved before implementation by a responsible person with appropriate knowledge and background. You must communicate approved changes to the appropriate personnel in a timely manner.