Changes made by Council Directive 79/830/EEC of 11 September 1979 on the approximation of the laws of the Member States relating to hot-water meters
EU Directive 1979/830
No changes made by Council Directive 79/830/EEC of 11 September 1979 on the approximation of the laws of the Member States relating to hot-water meters are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.