The Marriage (Definition of Marriage) Amendment Act 2013 is an Act of Parliament in New Zealand, which since 19 August 2013, allows same-sex couples to legally marry. The Act was proposed as a member's bill by MP Louisa Wall in May 2012, and was drawn from the ballot in July of that year. It passed its third reading in the House of Representatives on 17 April 2013, and became law when it received the Royal Assent two days later.