You are looking at a part of the Income Tax Act 2007 called 'Enactments repealed'. This means it is a list of laws that are no longer valid. The laws that are no longer valid include the Income Tax Act 2004. This is because of a section in the act that gives the power to repeal laws, which can be found in s ZA 1. You will also see some regulations that are no longer valid. These include the Income Tax (Withholding Payments) Regulations 1979. These regulations are no longer part of the law. The list of repealed laws and regulations is important because it helps you understand what laws are still valid and what laws are not. It is part of the Income Tax Act 2007, which is a law that deals with income tax in New Zealand. The act has many different parts, including this list of repealed laws and regulations.