[Code of Federal Regulations] [Title 13, Volume 1] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 13CFR147.610] [Page 592] TITLE 13--BUSINESS CREDIT AND ASSISTANCE CHAPTER I--SMALL BUSINESS ADMINISTRATION PART 147_GOVERNMENTWIDE REQUIREMENTS FOR DRUG-FREE WORKPLACE Subpart F_Definitions Sec. 147.610 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.