Changes made by Council Directive 93/30/EEC of 14 June 1993 on audible warning devices for two- or three-wheel motor vehicles
EU Directive 1993/30
No changes made by Council Directive 93/30/EEC of 14 June 1993 on audible warning devices for two- or three-wheel motor vehicles are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.