CANBERRA, AUSTRALIA - JUNE 01: Leader of the Opposition Bill Shorten and Deputy Leader of the Opposition Tanya Plibersek pose with the same-sex marriage bill during a morning tea at Parliament House on June 1, 2015 in Canberra, Australia. The proposed changes to the Marriage Act will define marriage as "the union of two people to the exclusion of all others, voluntarily entered into for life" reversing amendments by former Prime Minister John Howard in 2004 to define marriage as between a "man and a woman to the exclusion of all others". (Photo by Stefan Postles/Getty Images)
