Notification of change in technical characteristics
10. A manufacturer or, as the case may be, an importer of a class of car to which this Order applies, except a class of car for which an EEC fuel consumption document or an ECE fuel consumption document has been issued, in respect of which an official fuel economy certificate has been issued who intends to make any changes in the technical characteristics of the car may notify the Secretary of State on the form shown in Schedule 4 and the Secretary of State may, if satisfied that the proposed changes in the technical characteristics are such as to make it appropriate to do so, notify the manufacturer that no further test is needed and, in that event, the test results recorded in the official fuel economy certificate for the class of car before the change in technical characteristics shall be regarded as the test results for the class of car after the change in technical characteristics and the Secretary of State shall amend the official fuel economy certificate accordingly.