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Article 4U.K.

With regard to List I substances:

(a)

all discharges into the waters referred to in Article 1 which are liable to contain any such substance, shall require prior authorisation by the competent authority of the Member State concerned;

(b)

the authorisation shall lay down emission standards with regard to discharges of any such substance into the waters referred to in Article 1 and, where this is necessary for the implementation of this Directive, to discharges of any such substance into sewers;

(c)

authorisations may be granted for a limited period only. They may be renewed, taking into account any changes in the emission limit values laid down by the Directives referred to in Annex IX to Directive 2000/60/EC.