“fish pass” means any fish pass, ladder, fish way or lift or other device which facilitates the free passage, upstream or downstream, of salmon around, over or through any dam;

“monofilament netting” means any netting containing any mesh the sides of which consist of a single filament of synthetic material;

“off-take” includes a lade;

“operator” in relation to a dam or off-take means its owner or, where another person is in occupation or control of it, that person;

“the principal Order” means the Scotland Act 1998 (River Tweed) Order 2006.