The above approval mark affixed to a vehicle shows that the type concerned has been approved in the Netherlands (E 4) pursuant to Regulations Nos. 18 and 51. [1] The first two digits of the approval numbers indicate that, on the date on which these approvals were granted, Regulation No. 18 included the 03 series of amendments and Regulation No. 51 included the 02 series of amendments. a0c0