hese Bye-laws, made by the Department of Agriculture, Fisheries and Forestry under the Sea-Fisheries Act 1971, mainly prescribe rules for the use of gear in marine fishing operations but they also concern the minimum size of sea fish and place restrictions on fishing for herring, on fishing for shrimps to protect flatfish, and on fishing for salmon and sea trout. They prohibit the carrying out on board a fishing vessel any physical or chemical processing of fish to produce fish-meal, fish-oil or