(1) In this chapter:
"commercial quantity" means—
(a) for a controlled drug—a quantity of the drug that is not less than the quantity prescribed by regulation as a commercial quantity of the drug; and
(b) for a controlled plant—a quantity of the plant that is not less than the quantity prescribed by regulation as a commercial quantity of the plant; and
(c) for a controlled precursor—a quantity of the precursor that is not less than the quantity prescribed by regulation as a commercial quantity of the precursor.
"large commercial quantity" means—
(a) for a controlled drug—a quantity of the drug that is not less than the quantity prescribed by regulation as a large commercial quantity of the drug; and
(b) for a controlled plant—a quantity of the plant that is not less than the quantity prescribed by regulation as a large commercial quantity of the plant; and
(c) for a controlled precursor—a quantity of the precursor that is not less than the quantity prescribed by regulation as a large commercial quantity of the precursor.
"trafficable quantity" means—
(a) for a controlled drug—a quantity of the drug that is not less than the quantity prescribed by regulation as a trafficable quantity of the drug; and
(b) for a controlled plant—a quantity of the plant that is not less than the quantity prescribed by regulation as a trafficable quantity of the plant.
(2) For this chapter, a trafficable, commercial or large commercial quantity of a controlled drug in a mixture of substances is, subject to the regulations—
(a) if the prosecution elects to establish the quantity of the drug in the mixture—the relevant quantity of the drug worked out by reference to the quantity (if any) prescribed by regulation for the pure form of the drug; and
(b) if the prosecution elects to
establish the quantity of the mixture instead of the quantity of the drug in
the mixture—the relevant quantity of the mixture worked out by reference
to the quantity (if any) prescribed by regulation for a mixture containing the
drug.