Changes made by Council Directive of 21 December 1977 on the approximation of the laws of the Member States relating to the wiper and washer systems of motor vehicles (78/318/EEC)
EU Directive 1978/318
No changes made by Council Directive of 21 December 1977 on the approximation of the laws of the Member States relating to the wiper and washer systems of motor vehicles (78/318/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.