Income tax return for taxation also vary, making comparisons all the more difficult. Countries that tax income generally use one of two systems: territorial or residential. In the territorial system, only local income – income from a source inside the country – is taxed. In the residential system, residents of the country are taxed on their worldwide (local and foreign) income, while nonresidents are taxed only on their local income. In addition, a very small number of countries, notably the United States, also tax their nonresident citizens on worldwide income. Countries with a residential system of taxation usually allow deductions or credits
Working Party on the Reorganisation of the Income Tax Act 1976 Following on from these reports the government in 1995 established a review process for rewriting the income tax legislation, overseen by an advisory panel drawn from the private and public sectors. The Income Tax Act has since been largely rewritten in a plain English style with a radically re-organised structure, including a unique (for New Zealand) alpha-numeric section referencing system (as opposed to the more usual numeric system. It was re-enacted as the Income Tax Act 1994 and again as the Income Tax Act 2007 as the various parts of the legislation was progressively rewritten. The Rewrite Advisory Panel was