They consider that this goal has been achieved by the exemptions granted to non-aggregate producers (and a growing number of aggregate producers) for products which should in fact be called aggregates, because they are sold for the same purpose as material from an aggregate producer.
Les roches calcaires, les roches ignées et le grès sont tous utilisés à d'autres fins, par exemple comme pierres de construction ou dans le cas du calcaire comme chaux industrielle.