The package, currently distributed as part of the l3experimental bundle, provides control over the boxes that accept material as a page is filled.
The package on CTAN is based on a snapshot of the LaTeX SVN repository on 2013-10-08.
The author is The LaTeX Team. The package is Copyright © 2010,2011 The LaTeX3 Project.
License: lppl1.3 Version: SVN 3463, dated: 2013-10-08 Catalogued: 2015-08-03