The Marriage Amendment Act 2013 is an Act of Parliament in New Zealand, which since 19 August 2013, allows same-sex couples to legally marry.

A private member's bill is a bill introduced into a legislature by a legislator who is not acting on behalf of the executive branch. The designation "private member's bill" is used in most Westminster system jurisdictions, in which a "private member" is any member of parliament (MP) who is not a member of the cabinet (executive). Other labels may be used for the concept in other parliamentary systems; for example, the label member's bill is used in the Scottish Parliament and the New Zealand Parliament, the term private senator's bill is used in the Australian Senate, and the term public bill is used in the Senate of Canada. In legislatures where the executive does not have the right of initiative, such as the United States Congress, the concept does not arise since bills are always introduced by legislators.