Changes made by Council Directive of 4 March 1974 on the approximation of the laws of the Member States relating to the type-approval of wheeled agricultural to forestry tractors (74/150/EEC)
EU Directive 1974/150
No changes made by Council Directive of 4 March 1974 on the approximation of the laws of the Member States relating to the type-approval of wheeled agricultural to forestry tractors (74/150/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.