[Code of Federal Regulations] [Title 21, Volume 7] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR610.10] [Page 61] TITLE 21--FOOD AND DRUGS DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued) PART 610--GENERAL BIOLOGICAL PRODUCTS STANDARDS--Table of Contents Subpart B--General Provisions Sec. 610.10 Potency. Tests for potency shall consist of either in vitro or in vivo tests, or both, which have been specifically designed for each product so as to indicate its potency in a manner adequate to satisfy the interpretation of potency given by the definition in Sec. 600.3(s) of this chapter.