[Code of Federal Regulations] [Title 21, Volume 9] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR1405.610] [Page 262] TITLE 21-FOOD AND DRUGS CHAPTER III--OFFICE OF NATIONAL DRUG CONTROL POLICY PART 1405_GOVERNMENTWIDE REQUIREMENTS FOR DRUG-FREE WORKPLACE (FINANCIAL ASSISTANCE)--Table of Contents Subpart F_Definitions Sec. 1405.610 Controlled substance. Controlled substance means a controlled substance in schedules I through V of the Controlled Substances Act (21 U.S.C. 812), and as further defined by regulation at 21 CFR 1308.11 through 1308.15.