TACs and quotas - EU fishing rules
Total allowable catches (TACs) are catch limits that are set for most significant commercial fish stocks. TACs are proposed by the Commission on the basis of scientific advice on the state of the stocks concerned and decided on by the Council of Fisheries Ministers. TACs are set annually for most stocks and every two years for deep sea species. For an increasing number of stocks, TACs are set in line with multi-annual plans. The TACs are shared between EU countries under a system known as 'relative stability' which keeps national quotas stable in relation to each other, even when the total quantity of fish that can be caught varies with the productivity of the fish stocks.
The link address is: http://ec.europa.eu/fisheries/cfp/fishing_rules/tacs/index_en.htm