The 2009 Liberal leadership election was the last one in which the leader was chosen by delegates. Future leadership elections were to be conducted according to a weighted one member, one vote system in which all party members could cast ballots but in which they would be counted so that each riding had equal weight. This system, however, has been modified in the 2012 Biennial Convention in Ottawa. In addition to the card-carrying membership, registered supporters, a newly created category of Liberal sympathisers, given the right to vote in their constituency.