For instance, the amount of recycled paper in certain paper products, the proportion of recycled glass in glass containers, and the amount of scrap aluminum or scrap steel in new metal items can be specified by regulation.
(the amount of recycled paper in certain paper products, the proportion of recycled glass in glass containers, and the amount of scrap aluminum or scrap steel in new metal items; can be specified; by regulation)
the amount of recycled paper in certain paper products, the proportion of recycled glass in glass containers, and the amount of scrap aluminum or scrap steel in new metal items
can be specified
by regulation