Article 13: Period of application - Commission Implementing Decision (EU) 2016/1040 of 24 June 2016 on granting a derogation requested by Italian Republic with regard to the Regions of Lombardia and Piemonte pursuant to Council Directive 91/676/EEC concerning the protection of waters against pollution caused by nitrates from agricultural sources (notified under document C(2016) 3820) (Only the Italian text is authentic)