# The Road Vehicles (Authorisation of Special Types) (General) Order 2003, Paragraph 9

Extent: E+W+S

(1) The following modifications apply for the purposes of each Type O test conducted in accordance with Annex II to Council Directive 71/320/EEC.
(2) References to a laden vehicle are to be taken to be references to a vehicle laden with the maximum technically permissible mass specified by the manufacturer for the vehicle speed specified for the test.
(3) For a trailer that is designed and constructed for use as part of an AILV-combination falling within Category 3—
(a) where X (stated in the Directive as being a percentage of the force corresponding to the maximum mass carried by the wheels of the stationary vehicle) is specified in paragraph 2.2.1.2.1 of Annex II as having the values of 45 or 50, X is to be taken to have the value of 30; and
(b) where the test speed is specified in that paragraph as 60km/h, the test speed is to be taken to be 48km/h.
(4) In relation to a towing vehicle of category N3 that is designed and constructed for use as part of an AILV-combination falling within Category 3—
(a) if the performance of a service braking device is determined by measuring the stopping distance in relation to the initial speed, the stopping distance in paragraph 2.1.1.1.1 of Annex II is to be taken to be—
0.15v+v277.5
(b) if the performance of the service braking device is determined by measuring the reaction time and the mean deceleration, the mean braking deceleration at normal engine speed in paragraph 2.1.1.1.1 of Annex II is to be taken to be at least 3 m/s2 ;
(c) if the performance of a secondary braking device is determined by measuring the stopping distance in relation to the initial speed, the stopping distance in paragraph 2.1.2.1 of Annex II is to be taken to be—
0.15v+v237.5
(d) if the performance of the secondary braking device is determined by measuring the reaction time and the mean deceleration, the mean braking deceleration in paragraph 2.1.2.1 of Annex II is to be taken to be at least 1.45 m/s2.

---
Source: https://www.legislation.gov.uk/uksi/2003/1998/schedule/1/paragraph/9 (the official version)
Page: https://openlegislation.uk/road-vehicles-authorisation-of-special-types-general-order-2003/schedule-1/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.