http://www.legislation.gov.uk/uksi/1994/1057/contents/made
The Surface Waters (River Ecosystem) (Classification) Regulations 1994
Local Government
King's Printer of Acts of Parliament
2014-08-19
WATER RESOURCES, ENGLAND AND WALES
These Regulations prescribe a system of classifying the general quality of inland freshwaters which are relevant rivers or watercourses (as defined in section 104 of the Water Resources Act 1991 (“the Act”)). The system, which consists of five classes ranging in order of decreasing quality from RE1 to RE5, will be used for establishing quality objectives under section 83 of the Act.
The Surface Waters (River Ecosystem) (Classification) Regulations 1994
Regulations
The Surface Waters and Water Resources (Miscellaneous Revocations) Regulations 2015
The Surface Waters (River Ecosystem) (Classification) Regulations 1994
The Natural Resources Body for Wales (Functions) Order 2013
Gorchymyn Corff Adnoddau Naturiol Cymru (Swyddogaethau) 2013