Sch 22 para 6
(1) Section 10 (detention of persons affected by alcohol or a drug) is amended as follows. (2) In subsection (1), for “or 5” substitute “ , 5 or 5A ” . (3) In subsection (2), for the words from “whilst his ability” to the end substitute whilst— (a) the person's ability to drive properly is impaired, (b) the proportion of alcohol in the person's breath, blood or urine exceeds the prescribed limit, or (c) the proportion of a specified controlled drug in the person's blood or urine exceeds the specified limit for that drug.