Transport and Works Act 1992

27 Offences involving drink or drugs on transport systems

(1) If a person works on a transport system to which this Chapter applies—

(a) as a driver, guard, conductor or signalman or in any other capacity in which he can control or affect the movement of a vehicle, or

(b) in a maintenance capacity or as a supervisor of, or look-out for, persons working in a maintenance capacity,

when he is unfit to carry out that work through drink or drugs, he shall be guilty of an offence.

(2) If a person works on a transport system to which this Chapter applies—

(a) as a driver, guard, conductor or signalman or in any other capacity in which he can control or affect the movement of a vehicle, or

(b) in a maintenance capacity or as a supervisor of, or look-out for, persons working in a maintenance capacity,

after consuming so much alcohol that the proportion of it in his breath, blood or urine exceeds the prescribed limit, he shall be guilty of an offence.

(3) For the purposes of this section, a person works on a transport system in a maintenance capacity if his work on the system involves maintenance, repair or alteration of—

(a) the permanent way or other means of guiding or supporting vehicles,

(b) signals or any other means of controlling the movement of vehicles, or

(c) any means of supplying electricity to vehicles or to the means of guiding or supporting vehicles,

or involves coupling or uncoupling vehicles or checking that they are working properly before they are used on any occasion.

(4) For the purposes of subsection (1) above, a person shall be taken to be unfit to carry out any work if his ability to carry out that work properly is for the time being impaired.