Changes made by Commission Directive 1999/55/EC of 1 June 1999 adapting to technical progress Council Directive 77/536/EEC relating to the roll-over protection structures of wheeled agricultural or forestry tractors
EU Directive 1999/55
No changes made by Commission Directive 1999/55/EC of 1 June 1999 adapting to technical progress Council Directive 77/536/EEC relating to the roll-over protection structures of wheeled agricultural or forestry tractors are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.