Benedict signed a legal document, issued Monday, with some line-by-line changes to the 1996 Vatican law governing the election of a new pope. It is one of his last acts as pope before resigning Thursday.
The date of the conclave's start is important because Holy Week begins March 24, with Easter Sunday March 31. In order to have a new pope in place for the church's most solemn liturgical period, he would need to be installed by Sunday, March 17 -- a tight timeframe if a conclave were to start March 15.
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