Changes made by Council Directive of 21 December 1988 on the approximation of the laws of the Member States relating to certain components and characteristics of wheeled agricultural or forestry tractors (89/173/EEC)
EU Directive 1989/173
No changes made by Council Directive of 21 December 1988 on the approximation of the laws of the Member States relating to certain components and characteristics of wheeled agricultural or forestry tractors (89/173/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.