Any person required to provide a specimen for a laboratory test under section 9(1) of this Act may thereafter be detained at the police station until he provides a specimen of breath for a breath test and it appears to a constable that the device by means of which the test is carried out indicates that the proportion of alcohol in that person's blood does not exceed the prescribed limit.
Section 11: Detention of persons while affected by alcohol
Road Traffic Act 1972 · 1972 c. 20View on legislation.gov.uk
Part I: Principal Road Safety Provisions
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