Changes made by Commission Directive 28 March 1983 adapting to technical progress Council Directive 78/764/EEC on the approximation of the laws of the Member States relating to the driver's seat on wheeled agricultural or forestry tractors (83/190/EEC)
EU Directive 1983/190
No changes made by Commission Directive 28 March 1983 adapting to technical progress Council Directive 78/764/EEC on the approximation of the laws of the Member States relating to the driver's seat on wheeled agricultural or forestry tractors (83/190/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.