In section 30 of the [1975 c. 51.] Salmon and Freshwater Fisheries Act 1975 (prohibition of introduction of fish into inland waters without the consent of the water authority), at the end there shall be added the words " or the inland water is one which consists exclusively of, or of part of, a fish farm and which, if it discharges into another inland water, does so only through a conduit constructed or adapted for the purpose.
In this section " fish farm " has the same meaning as in the [1937 c. 33.] Diseases of Fish Act 1937.".