Chapter:	374A	Title:	Road Traffic (Construction and Maintenance of Vehicles) Regulations	Gazette Number:	E.R. 2 of 2012
Regulation:	18	Heading:	Vacuum or pressure braking systems	Version Date:	02/08/2012

(1) Subject to paragraph (2) and except in the case of a motor vehicle to which paragraph (3) applies, every motor vehicle which is equipped with a braking system which embodies a vacuum or pressure reservoir or reservoirs shall be provided with a warning device so placed as to be readily visible or audible to the driver of the vehicle when in the driving seat in order to indicate any impending failure or deficiency in the vacuum or pressure system.
(2) In the case of a vehicle the permitted gross vehicle weight of which does not exceed 5.5 tonnes which is propelled by an internal combustion engine and is equipped with a braking system embodying a vacuum reservoir or reservoirs, the vacuum therein being derived directly from the induction system of the engine, it shall not be necessary to provide a warning device in accordance with paragraph (1) if, in the event of a failure or deficiency in the vacuum system, the brakes of that braking system are sufficient to provide a braking efficiency of 50 per cent.
(3) A motor vehicle which is equipped with a braking system which uses compressed air only as its means of operation shall be fitted with a suitable air pressure gauge or gauges and a suitable audible warning device to indicate low air pressure. (L.N. 203 of 1990)
(4) Where a motor vehicle to which paragraph (3) applies was manufactured on or before 1 January 1990 or was first registered on or before 1 July 1990, it shall be sufficient compliance with paragraph (3) if it is fitted with a suitable air pressure gauge or gauges. (L.N. 203 of 1990)