The internal distribution network referred to in 3° of article R. 1321-43 may include an additional water quality treatment system, provided that the end consumer also has access to cold water that is not subject to this additional treatment.
An order by the ministers responsible for construction and health, issued after consultation with the Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail, defines :
1° The procedures for applying the provisions of the first paragraph to installations completed before 22 December 2001;
2° Any deadlines for bringing these installations into compliance;
3° In cases where, due to the age of the installations, it proves impossible, for technical or financial reasons, to bring them into compliance, the specific conditions for monitoring the quality of the water distributed.