This part of ISO 7397 specifies a test method for verifying the compliance of a passenger car (as defined in ISO 3833) with the requirements of EEC Directives 77/649 and 88/366 for the driver's 180° forward field of view. It does not preclude the use of other methods, provided that the validity of the results obtained can be proved, and that due account is taken of the accuracy of the method employed. NOTE 1 Part 1 specifies the vehicle positioning for static measurement as the stage prior to carrying out this test method.