These Regulations further implement in Scotland the requirements of Council Directive 91/676/EEC concerning the protection of waters against pollution caused by nitrates from agricultural sources by designating the revised vulnerable zones in accordance with Article 3(4) of the Directive. Under Article 3(1) of the Directive, Member States are required to identify waters affected by pollution and waters which could be affected by pollution in accordance with the criteria set out in Annex 1 to the Directive. They are then to designate as vulnerable zones all known areas of land in their territories which drain into these waters and which contribute to pollution. The Regulations also make consequential amendments to other Regulations.