A third party's licence text or notice, carried verbatim.

Each file given this identifier is the licence text or the notice of a
third-party component, as its holder publishes it, and is carried as that
holder allows its text to be copied: verbatim. The text is its holder's, and
the project licenses nothing in it. The component it belongs to is under the
terms the text states; where the component is in the tree, its own files say
so.
