No, the position was changed to support SSM, but as a compromise allow a conscience vote.This is incorrect. Labor's 2011 national conference voted to give MPs a conscience vote on the issue of gay marriage. The policy was pushed by Prime Minister Julia Gillard who opposed same sex marriage.
"You all know what my views on this debate are and I know many in this hall do not agree with my views on this debate," she told delegates.Yet if you maintain the same views as Prime Minister Gillard a mere six years ago (or Rudd four) you are accused of being a bigot.
"But what is the most important thing is that as we have this debate in this hall we have this debate in a climate and atmosphere of respect."
https://www.theguardian.com/world/2011/dec/03/gay-marriage-australia-labor-party-endorse