There are significant established boundaries. Part of what is happening here is that we have never needed before to have any official policy on this, because - since same-sex marriage was not legal at all - we didn't need to say we wouldn't do it. That was a given.
Now same-sex marriage is legal in Australia and we need to work out how we will deal with the fact that some people in our churches will take up the option to marry; some people coming to faith will be in same-sex marriages; and many of our members will be trying to work out how their faith affects their relationships with friends and family members in or aspiring to same-sex marriages.
It's not surprising that these are complex questions and that opinions are divided. It will take time to sort it all out. In the meantime (as I said in one of Melbourne's synod debates) we all need to allow one another space, time and grace to find our place in the changed landscape.
Oh the horror!
These are completely separate issues.