junk
(d) The term “junk” shall mean old or scrap copper, brass, rope, rags, batteries, paper, trash, rubber debris, waste, or junked, dismantled, or wrecked automobiles, or parts thereof, iron, steel, and other old or scrap ferrous or nonferrous material.
Source
23 USC § 136(d)
Scoping language
None identified, default scope is assumed to be the parent (chapter 1) of this section.