The initial motion mentions at the bottom of the page that the study of the bill should commence no later than Thursday, November 2, 2006, and that there should be a clause-by-clause study no later than November 21. That is where the first change goes: we replace this latter date by December 5, 2006. And then we add that the report of the bill to the House must be no later than December 7, 2006.
It is therefore a simple amendment which replaces November 21 by December 5 and November 23 by December 7.