S.L. 549.24 ст. 9Methods of analysis.

(1) Certain reference methods of analysis for the parameters concerned are set out in Annex I. Laboratories which employ other methods shall ensure that the results obtained are equivalent or comparable to those specified in Annex I.

(2) Any implementation of the measures taken pursuant to these regulations may on no account lead, either directly or indirectly, to increased pollution of fresh water.