Changes made by Council Directive of 18 July 1978 on the quality of fresh waters needing protection or improvement in order to support fish life (78/659/EEC)
EU Directive 1978/659
No changes made by Council Directive of 18 July 1978 on the quality of fresh waters needing protection or improvement in order to support fish life (78/659/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.