Changes made by Council Directive of 25 June 1974 on the approximation of the laws of the Member States relating to rear-view mirrors for wheeled agricultural of forestry tractors (74/346/EEC)
EU Directive 1974/346
No changes made by Council Directive of 25 June 1974 on the approximation of the laws of the Member States relating to rear-view mirrors for wheeled agricultural of forestry tractors (74/346/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.