The area of sea over which a state claims exclusive fishing rights, except as agreed in treaties with other states. British fishery limits extend to 200 nautical miles from the baselines used for measuring the territorial waters. Fishery limits may be limited or restricted by bilateral or multilateral fishing treaties or agreements, such as the EU's Common Fisheries Policy. The UK Merchant Shipping Act 1988 preventing “quota hopping” (see quota) in British waters by non-UK EU vessels, such as Spanish and Dutch vessels, was held unlawful by the European Court of Justice in 1996. See also exclusive economic zone.