 Hunter co-sponsored the 2011 Marriage Equality Bill with Greens MLC Tammy Franks also supported by the Australian Marriage Equality under its then national convenor Alex Greenwich who became the first same-sex married parliamentarian in Australia and the NSW Legislative Assembly.If passed it would be the first piece of legislation in Australia to grant same-sex couples equal marriage rights.The legislation is based on formal constitutional advice from Professor George Williams that, while Federal marriage law prohibits same-sex marriage, the states may be able to introduce their own legislation without being rendered invalid by Section 109 of the Australian Constitution.