4. See for example, SEPA's enforcement policy.
5. Scottish Environment Protection Agency, Scottish Natural Heritage, Local Authorities, Marine Scotland, Crown Estate Scotland, and Animal, Plant and Health Authority.
6. The Technical Working Group was tasked by the Scottish Government with developing a practical framework for assessing the level of risk posed to wild salmon and sea trout taking account of the best available scientific understanding and the precautionary principle. The technical group comprises experts from the regulators - Marine Scotland, SEPA, SNH and representatives of local authorities.
7. In 2015, a new set of rules came into force in Norway to regulate the collective responsibility for recapturing farmed fish that have escaped and ended up in rivers. On the basis of the new rules, OURO, an organisation tasked with removing escapee farmed fish from bodies of water, was formed in the same year. OURO is financed by the industry and involvement is compulsory for farmers.