Council Directive 91/271/EEC of 21 May 1991 concerning urban waste-water treatment
Modified by
Council Directive 2013/64/EU of 17 December 2013 amending Council Directives 91/271/EEC and 1999/74/EC, and Directives 2000/60/EC, 2006/7/EC, 2006/25/EC and 2011/24/EU of the European Parliament and of the Council, following the amendment of the status of Mayotte with regard to the European Union
| January 1, 2014 | article 17 .1 | Amendment |
| January 1, 2014 | article 4.1 BI | Addition |
| January 1, 2014 | article 17 .2 | Amendment |
| January 1, 2014 | article 7 | Amendment |
| January 1, 2014 | article 3.1 BI | Addition |
| January 1, 2014 | article 5.2 BI | Addition |