(1)In this Act “psychoactive substance” means any substance which—
(a)is capable of producing a psychoactive effect in a person who consumes it, and
(b)is not an exempted substance (see section 3).
(2)For the purposes of this Act a substance produces a psychoactive effect in a person if, by stimulating or depressing the person’s central nervous system, it affects the person’s mental functioning or emotional state; and references to a substance’s psychoactive effects are to be read accordingly.
(3)For the purposes of this Act a person consumes a substance if the person causes or allows the substance, or fumes given off by the substance, to enter the person’s body in any way.