The document discusses the Income Tax Ordinance of 2001 in Pakistan. It provides some background and history on the ordinance. A commission report from May 2001 recommended replacing the previous 1979 ordinance. The new 2001 ordinance was published in September 2001 and became effective from July 2002. It overhauled the previous law by abolishing the role of assessing officers and requiring taxpayers to self-assess their tax liability. The government claimed the new ordinance would bring revolutionary changes and make the tax law easier to understand and aligned with global standards. The ordinance has since been amended annually through Finance Ordinances or Acts.