Article 4
It shall be prohibited to carry on board or deploy any beam trawl of mesh size equal to or greater than 70 mm unless the entire upper half of the anterior part of such a net consists of a panel of netting material of which no individual mesh is of mesh size less than 180 mm attached: - directly to the headline, or - to no more than three rows of netting material of any mesh size attached directly to the headline. The panel of netting shall extend towards the posterior of the net for at least the number of meshes determined by: (a) dividing the length in metres of the beam by 12; (b) multiplying the result obtained in (a) by 5400; (c) dividing the result obtained in (b) by the mesh size, in millimetres, of the smallest mesh in the panel; (d) ignoring any decimal or other fractions in the result obtained in (c).