The principal conservation measures are enshrined in the Wild Salmon and Sea Trout Tagging Scheme Regulations, which are revised on an annual basis and provide for the introduction of salmon conservation measures. Since 2007, the harvest of salmon, by commercial and recreational (angling) means, has been restricted to those stocks of rivers that are meeting their conservation limits. A fund of EUR 30 million was allocated for the purpose and 1 171 former licence holders received payments aligned with the previous catch history on the basis that they undertook not to engage in the fishery in future.