This classification, and the way they are subsequently handled within the definitions, concepts, and thresholds established in the 1994 Agreement on Subsidies and Countervailing Measures has meant that managing fisheries subsidies through multilateral trade regulations at the WTO has been difficult to date. Negotiations to clarify and improve disciplines on fisheries subsidies were then formally started at the Doha Ministerial Conference in 2001 and, following the Hong Kong Ministerial Conference of 2005, text proposing an entirely new set of sector-specific disciplines for fisheries subsidies within the Agreement on Subsidies and Countervailing Measures was proposed by the Chairman of the Negotiating Group on Rules in 2007. Disagreement within the group over many issues resulted in a systematic revision process being undertaken in 2009 but there has been no further progress.