If the surface is composed of more than two distinct parts either the total area of the projections shall occupy not less than 60 per cent of the smallest quadrilateral circumscribing these projections or the distance between two adjacent distinct parts shall not exceed 15 mm.]
Si la plage est composée de plus de deux parties distinctes, soit la surface totale des projections occupe au moins 60 % du plus petit quadrilatère circonscrit à ces projections, soit la distance entre deux parties distinctes adjacentes ne dépasse pas 15 mm.]