WARNING: Applicants are advised not to proceed with alterations to buildings or purchase of equipment, etc, before receiving written approval in principle from the Driver and Vehicle Standards Agency. THE DIMENSIONS IN THIS SECTION ARE THE MINIMUMREQUIREMENTS FOR AUTHORISATION AS A VEHICLE TEST STATION FOR CLASS 7 VEHICLES. The dimensions of your test bay should take into account the requirements of your business. When considering the contents of this document you should be aware that the equipment and/or layout selected may affect the type of vehicle able to be tested. Contents 1.Premises, Test Bay and Equipment Layout. 2. Underside Inspection. 3. Headlamp Aim Testing. 4. Brake Testing. 5. Emissions Testing.