Whether a conviction of a substantive offense under 21 U.S.C. § 841 requires jury finding of defendant's knowledge of drug type and quantity

QUESTION PRESENTED 1. Whether a conviction of a substantive offense under 21 U.S.C. § 841 of the Controlled Substances Act (“CSA”) requires that a jury find beyond a reasonable doubt that the defendant had knowledge of the type and quantity of controlled substance involved where the type and quantity of controlled substance alleged in the indictment increases the statutory minimum or maximum sentence.