2013 changes to the election of popes
In the course of his papacy, Benedict XVI (r. 2005–2013) issued two documents altering certain details of the procedures for electing a pope: De electione romani pontificis on 11 June 2007 and Normas nonnullas on 22 February 2013. These instructions amended the extensive set of rules and procedures issued on 22 February 1996 by his predecessor John Paul II in his apostolic constitution Universi Dominici gregis.
Benedict reversed or modified some innovations John Paul had instituted that dealt with procedures to be followed if a papal conclave lasted more than two weeks. He also modified the cardinals' authority to set the start date of a conclave and tightened the punishment for support personnel who violate their oath of secrecy.