Marriage Alliance Binary Australia
Sophie York, Marriage Alliance spokeswoman (Image: AAP/Dan Himbrechts)

The activists formerly known as Marriage Alliance -- a shadowy group of opaque membership and indeterminate funding, formed to oppose marriage equality -- have yanked one the key subtexts of their marriage campaign and run with it.

They are now a specifically anti-trans group called Binary Australia, which “aims to promote and celebrate the inherent differences between boys and girls, men and women".