"The CSA [Controlled Substances Act] classifies marijuana in the first category of schedules, placing it among the most harmful and dangerous drugs.137 Marijuana meets the criteria for a Schedule I controlled substance because of its THC content, which is a psychoactive hallucinogenic substance with a high potential for abuse.138 Another key classification made by the CSA regarding marijuana was its broad definition of the drug.139 The CSA defines marijuana as follows:
"The term ‘“marihuana” means all parts of the plant Cannabis sativa L., whether growing or not; the seeds thereof; the resin extracted from any part of such plant; and every compound, manufacture, salt, derivative, mixture, or preparation of such plant, its seeds or resin. Such term does not include the mature stalks of such plant, fiber produced from such stalks, oil or cake made from the seeds of such plant, any other compound, manufacture, salt, derivative, mixture, or preparation of such mature stalks (except the resin extracted therefrom), fiber, oil, or cake, or the sterilized seed of such plant which is incapable of germination.140
"This effectively placed the entire use of the hemp plant, whether for drug use or as industrial hemp, squarely under the control of the CSA.141 Therefore, the DEA views industrial hemp containing .3% THC the same as marijuana grown for drug use which commonly contains a 24% THC level, or eighty times more THC.142"

Source

Duppong, Thomas A. Industrial Hemp: How the Classification of Industiral Hemp as Marijuana under the Controlled Substances Act Has Caused the Dream of Growing Industrial Hemp in North Dakota to Go up in Smoke. North Dakota Law Review. Grand Forks, ND: University of North Dakota School of Law, 2009, Vol. 85, No. 2.