Exemption
3. Subject to article 4, an exempt vehicle is authorised to be used for carriage on the Victoria Line even if it does not conform to, or it is used in a manner that does not conform to the requirements of—
(a)regulation 4(3)(b) (audible warning before door closes), but only in respect of the period of time for which the distinct sound should be emitted before the door starts to close;
(b)regulation 13(4) (passenger information when vehicle is stationary), but only in so far as it applies to the systems inside the passenger saloon;
(c)regulation 13(7) (height of lettering on visual public address systems), but only in so far as it applies to the visual system inside the passenger saloon;
(d)regulation 23(1) (boarding devices at wheelchair compatible doorways), but only in relation to a station named in the table in Schedule 2 or at Pimlico station.