13. Waste water treatment plants with a capacity exceeding 150,000 population equivalent as defined in Article 2(6) of Council Directive 91/271/EEC of 21 May 1991 concerning urban waste-water treatment M1.E+W
Marginal Citations
M1OJ No. L 135, 30.5.1991, p.40, last amended by Regulation (EC) No. 1137/2008 (O.J. No. L 311, 21.11.2008, p.1).