The Shetland Shellfish Management Organisation (SSMO) directly manages and regulates most of Shetland's inshore shellfish fisheries through a Regulating Order, giving it the powers to introduce its own regulations and control entry via license permits.
Further reading
SPICe briefing - Inshore Fisheries (February 2019)
SPICe Blog (4 part series) - The future of fisheries management in Scotland (November 2020)