Fra den 1. oktober 1988, for så vidt angår køretøjer med slagvolumen på over 2 000 cm', fra den 1. oktober 1990, for så vidt angår køretøjer med slagvolumen på under 1 400 cm3, fra den 1. oktober 1991, for så vidt angår køretøjer med slagvolumen på mellem
Member States may: from 1 October 1988 in the case of the types of vehicle which have an engine capacity above 2 000 cm3, from 1 October 1990 in the case of the types of vehicle which have an engine capacity below 1 400 cm3, from 1 October 1991 in the case of the types of vehicle which have an engine capacity of 1 400 to 2 000 cm3 inclusive, and from 1 October 1994 in the case of types of vehicle of the same capacity fitted with compressionignition engines of the direct injection type,