Changes made by Council Directive of 4 March 1974 on the approximation of the laws of the Member States relating to certain parts and characteristics of wheeled agricultural or forestry tractors (74/151/EEC)
EU Directive 1974/151
No changes made by Council Directive of 4 March 1974 on the approximation of the laws of the Member States relating to certain parts and characteristics of wheeled agricultural or forestry tractors (74/151/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.