Article 3 Exemptions relating to facilities for disabled persons
Subject to articles 5 and 6, an exempt vehicle is authorised to be used for carriage on the Circle, District and Hammersmith & City Lines even it does not conform with, or if it is used in a manner that does not conform with the requirements of—
paragraph 3(5)(b) (audible warning before door closes), but only in respect of the period of time for which the distinct sound must be emitted before the door starts to close;
paragraph 4(2) (illumination of control devices for doors), but only in respect of the period of time between the control device ceasing to be illuminated and the door starting to close;
paragraph 11(5) (passenger information when vehicle is stationary at a station), but only in so far as it applies to the systems inside the vehicle.