The amended section 37 of' "Universi Dominici Gregis" reads as follows:
37. “I furthermore decree that, from the moment when the Apostolic See is lawfully vacant, the Cardinal electors who are present must wait fifteen full days for those who are absent before beginning the Conclave; however, the College of Cardinals is also granted the faculty to anticipated [sic] the beginning of the Conclave if all the Cardinal electors are present as well as the faculty to defer, for serious reasons, the beginning of the election for a few days more. But when a maximum of twenty days have elapsed from the beginning of the vacancy of the See, all the Cardinal electors present are obliged to proceed to the election.”
Well everyone is happily predicting that this means the conclave will commence around the 9th of March and it probably will. But look at that phrase "if all the Cardinal electors are present". How does one assess that all the Cardinal electors are present? What is the definition of a Cardinal elector? If Julius Cardinal Darmaatmadja of Indonesia and Keith Patrick Cardinal O'Brien are not present how do we know they aren't coming? Is it enough that they've told a journalist they aren't coming? Should they write to the Dean or camerlengo? What if a Cardinal is delayed? How do we know he's not coming?
The legal text should have been drafted a little more carefully for the avoidance of any doubt.