From New Oxford Review:

FROM THE CURRENT ISSUE ------------------------------------------------------------------ From Guiding Lines to Institutional Reality [Excerpt] In the six years that have elapsed, two major Bene­dictine milestones have confirmed Allen’s observations: Sum­morum Pontificum,  Benedict’s 2007 motu pro­prio freeing the Tridentine Latin Mass,  and Anglicanorum Coetibus, the Pope’s 2009 apostolic constitution  establishing Anglican ordinariates. In the case of both the  Latin Mass and the ordinariates, Pope Benedict's response  was to revolutionize a policy put in place by his predecessor. Read all about it... http://www.newoxfordreview.org/note.jsp?did=0511-notes-lines