1.—(a) The plastic crate or plastic pallet shall be, or shall have been, manufactured in a controlled recycling process, that is to say a process in which the recycled material originates only from other plastic crates or plastic pallets and in which the introduction of external materials is the minimum which is technically feasible but in any event does not exceed 20 per cent by weight;
(b)no regulated metal shall be intentionally introduced as an element during the manufacture or distribution of the plastic crate or plastic pallet provided always that the incidental presence of any of these elements shall be permitted; and
(c)the concentration levels of regulated metals in the plastic crate or plastic pallet may only exceed the levels referred to in regulation 7 as a result of the addition of recycled materials.