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National Water Supply and Drainage Board Law, No. 2 of 1974.
Date of text: 01 November 1974
Irrigation Ordinance (Cap. 453).
Date of original text: 01 November 1946 (1973)
Prevention of Mosquito Breeding Act, 2007 (Act No. 11 of 2007).
Date of text: 11 April 2007
International Irrigation Management Institute Act No. 6 of 1985.
Date of text: 09 January 1985
Mahaweli Authority of Sri Lanka Act 1979 (No. 23 of 1979).
Date of text: 19 April 1979
Water Resources Board Act, No. 29 of 1964.
Date of text: 12 November 1964
Flood Protection Ordinance 1924 (No. 4 of 1924).
Date of original text: 06 May 1924 (1955)
National Environmental (Ambient Water Quality) Regulations, No. 01 of 2019.
Date of text: 05 November 2019
Colombo Municipal Council Waterworks Ordinance.
Date of original text: 02 January 1908 (1947)
Notice of the Minister of Water Supply on Water Tariffs.
Date of text: 25 August 2022
International Irrigation Management Institute (Amendment) Act, No. 50 of 2000
Date of text: 18 August 2000
Water Resource Board (Amendment) Act, No. 42 of 1999.
Date of text: 30 November 1999
Irrigation (Amendment) Act 1994 (No. 13 of 1994).
Date of text: 07 June 1994
Mahaweli Authority (Amendment) Act No. 59 of 1993.
Date of text: 13 December 1993
National Water Supply and Drainage Board (Amendment) Act, No. 13 of 1992.
Date of text: 11 March 1992
Irrigation (Amendment) Act 1990 (No. 34 of 1990).
Date of text: 06 September 1990
State Lands (Amendment) Act (Act No. 40 of 1978 and Act No. 10 of 1983)
Date of text: 01 April 1983
Irrigation (Amendment) Act 1983 (No. 23 of 1983).
Date of text: 13 July 1982