Changes made by Council Directive of 27 July 1970 on the approximation of the laws of the Member States relating to audible warning devices for motor vehicles (70/388/EEC)
EU Directive 1970/388
No changes made by Council Directive of 27 July 1970 on the approximation of the laws of the Member States relating to audible warning devices for motor vehicles (70/388/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.