The MOT Testing Guide Abbreviations & Definitions Issue Date March 2019 4 operates. DGW Design Gross Weight –- i.e. the maximum gross weight at which the vehicle was designed to operate. This is normally found on a plate fixed to the vehicle by the manufacturer or in the case of older or heavier vehicles by a Ministry Plate. Such plates are not required on all vehicles. Duplicate test documents A copy of the set of documents issued at the time of the test for which the duplicate is required. VT20/VT20W, VT30/VT30W DVLA Driver and Vehicle Licensing Agency. An agency of the Department for Transport responsible for driver and vehicle licensing. DVSA The Driver and Vehicle Standards Agency.