Changes made by Council Directive of 8 March 1984 on limit values and quality objectives for mercury discharges by sectors other than the chlor-alkali electrolysis industry (84/156/EEC)
EU Directive 1984/156
No changes made by Council Directive of 8 March 1984 on limit values and quality objectives for mercury discharges by sectors other than the chlor-alkali electrolysis industry (84/156/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.