While national and international attention has turned to Washington's new marijuana legalization law, there is one little-known section of the law that may extend the practical scope of this groundbreaking law even wider. The legal definition of "cannabis" is changed under the initiative to require scientific proof in court that the plant matter contains more than .3 percent THC, the psychoactive ingredient in marijuana. That was done presumably to distinguish marijuana the drug from hemp fabrics made from a similar plant. Most marijuana sold for medicinal or recreational use contains THC at levels beyond 10 percent, well over the .3 percent level now used to define the drug.