The general regulation of salmon fishing on rivers and lakes is a matter for the Department of Energy, Communications and Natural Resources. I assume the enterprise referred to by the Deputy is a "Put and Take" fishery.
From a fish health perspective, "Put and Take" fisheries must be authorised by the Marine Institute in accordance with S.I. No 261 of 2008 (as amended). All movements of live fish to and from "Put and Take" fisheries must be notified in advance to, and approved by, the Marine Institute. A "Put and Take" fishery should:
have appropriate record keeping to allow full traceability on their fish
have appropriate bio security measures in place at each facility
participate in the Risk Based Disease surveillance scheme operated by the Marine Institute, in conjunction with my Department's vets
report unexplained increased mortalities to the Marine Institute for investigation.