An '''operating authority''' is a body empowered under the [[Land Drainage Act 1991<ref>http://www.opsi.gov.uk/acts/acts1991/Ukpga_19910059_en_1.htm Land Drainage Act 1991 (c.59) Chapter 59 Internal Drainage Boards]]</ref> or [[Water Resources Act 1991]] to undertake land drainage or flood protection work in [[England]] and [[Wales]]. Operating authorities include [[Internal Drainage Board|Internal Drainage Boards]], the [[Environment Agency]] and [[Local Authorities]].<ref>[http://www.defra.gov.uk/environ/fcd/policy/idbrev/report.pdf Internal Drainage Board Review - Final Report]</ref>