These Regulations revoke and replace certain provisions in Part 2 of the Nitrate Pollution Prevention Regulations 2008 (S.I. 2008/2349) (“the principal Regulations”) which relate to the designation of nitrate vulnerable zones. The principal Regulations implement in England Council Directive 91/676/EEC concerning the protection of waters against pollution by nitrates from agricultural sources (OJ No L375, 5.12.1991, p.1).