Substantial factor

Section 102 of the Controlled Substances Act (21 U.S.C. 802) is amended by adding at the end the following: (61) (A) The term results, with respect to the relationship between the use of a substance and death or serious bodily injury, means the use of the substance is a substantial factor in causing such death or serious bodily injury. (B) For purposes of subparagraph (A), the term substantial factor means the use of the substance substantially contributes to the death or serious bodily injury, regardless of whether any other substance used also substantially contributes to the death or serious bodily injury..