 | Canadian Standards Association | Canada |
 | American National Standards Institute | United States |
 | American Society of Safety Engineers | United States |
 | Water Research Council | United Kingdom |
 | Office of the Water Authority | Hong Kong |
 | Kiwa N.V. | Netherlands |
 | Public Utilities Board | Singapore |
 | Bereich Umweltschutz Schallschutz und Technische Akustik | Germany |
 | VÝZKUMNÝ ÚSTAV POZEMNÍCH STAVEB PRAHA | Cheks Rep. |
. | Norges byggforskningsinstitutt | Norway |
. | Marque Nationale NF Association Francais de Normalisation | France |
. | Turkish Standards Institution | Turkey |
. | The Standards Institution of Isreal | Isreal |