[Code of Federal Regulations]
[Title 21, Volume 4]
[Revised as of April 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR225.158]

[Page 170]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 225_CURRENT GOOD MANUFACTURING PRACTICE FOR MEDICATED FEEDS--Table of Contents
 
                   Subpart G_Product Quality Assurance
 
Sec.  225.158  Laboratory assays.

    Where the results of laboratory assays of drug components, including 
assays by State feed control officials, indicate that the medicated feed 
is not in accord with the permissible limits specified in this chapter, 
investigation and corrective action shall be implemented immediately by 
the firm and such records shall be maintained on the premises for a 
period of 1 year.