1An individual who has been convicted of an offence under section 56(1) may appeal against the conviction if—
(a)a Part 2 notice, the extension of a Part 2 notice, or the revival of a Part 2 notice is quashed, or measures specified in a Part 2 notice are quashed, and
(b)the individual could not have been convicted had the quashing occurred before the proceedings for the offence were brought.